Biography: Yanlin Song is Researcher at the Institute of Chemistry, Chinese Academy of Sciences, and Director of the Key Laboratory of Green Printing. Having been long engaged in the cross-disciplinary research of nanomaterials and printing technology, he has made systematic innovations in nanomaterials creation, interfacial droplet manipulation (界面液滴操控) and printing and micro-nano manufacturing (印刷微纳制造). He has published more than 600 SCI papers, which have been cited more than 38,000 times with the H-index of 109. He has been authorized over 170 Chinese and international invention patents. Moreover, he has proposed and developed the nanoscale green printing and micro-nano manufacturing technology (纳米绿色印刷微纳制造技术), which made a breakthrough in tackling the coffee ring effect, Rayleigh-Taylor instability and Marangoni effect and other academic challenges that had been undermining the printing accuracy, printed and prepared wearable electronics, solar cells, ultrasensitive bio-detection chips (超敏生物检测芯片) and other functional devices; he also presided over the drafting of the IEC TC119 - International Standards for Printed Electronics, and promoted the green development of the micro-nano manufacturing printing technology. In 2006, he got subsidized by the National Science Fund for Distinguished Young Scholars and was granted the Special Merit Award; in 2016, he was appointed a Distinguished Professor of the Changjiang Scholars Program. Besides, he has also received many awards and honors such as the Second Prize of National Natural Science Award in 2008 and 2005, the First Prize of Beijing Science and Technology Award in 2016, the China Youth Science and Technology Award, the IEC1906 Award, the National Advanced Science and Technology Research Worker, the Third the National Award for Excellence in Innovation, and the Bisheng Award for Outstanding Achievements in Printing, to name a few.

Abstract:Based on the fundamental scientific issues of nanomaterial preparation and functional inkjet patterning, a systematic Nano Green Printing technology has been developed. The precise control of the conversion from translational kinetic energy to rotational kinetic energy before and after droplet collision has been achieved using patterned wettability surfaces. This process breaks through the scope of classical Newton’s collision law and realizes a change in the motion mode of droplets before and after collision, providing new ideas for the preparation and precise control of high-precision patterns. Starting from the manipulation of droplets for three-dimensional shaping, spontaneous contraction of droplets in three-dimensional space has been achieved by using templates, enabling rapid assembly and shaping of three-dimensional micro/nano structures using multiple materials. Furthermore, the evolution of foam has been controlled using micro-templates, overcoming the long-standing challenge of patterned control of bubbles, and realizing the anti-Oswald ripening and patterning of bubbles. This has been used as a printing template for the assembly of multiple functional materials. In particular, by utilizing the advantages of droplet manipulation in nanoscale green printing, we discover the critical conditions for the scattering-diffraction transition of nano-photonic structures, an optical metamaterial detection chip has been developed for ultra-sensitive and rapid detection of novel coronavirus, influenza virus, and tumor markers. This opens up new ideas for the printing fabrication of functional devices and micro/nano chips, and establishes the theoretical and technical system of nanoscale green printing technology.

Biography: Yongan Huang is Professor of Huazhong University of Science and Technology, Deputy Director of the State Key Laboratory of Intelligent Manufacturing Equipment and Technology, recipient of the National Science Fund for Distinguished Young Scholars and the XPLORER PRIZE and Chief Scientist of the Specialized Project of the National Key Research and Development Program. Engaged in the research of design, technical principles and manufacturing equipment of flexible electronics devices, he has published more than 150 SCI papers and 4 books. He has been authorized about 120 national invention patents and 4 U.S. patents and realized commercialization of some of his scientific research results. He has proposed the principle and equipment of electrohydrodynamic jet printing (E-jet 电流体喷印), Laser Lift Off (LLO) / Mass Transfer (MT) technology and equipment, etc., which are used in flexible displays, aircraft smart skin, electronic skins for robots, and so on. He has won many awards and honors such as the Second Prize of the National Technology Invention Award, the First Prize of Natural Science Award of Hubei Province and the First Prize of Technology Invention Award of Hubei Province. He is also the Editor-in-Chief of Soft Science, and an editorial board member of Sci. China Tech Sci. and Inter. J. of Extreme Manufact. and Vice Chairman of Micro-Nano Manufacturing and Equipment Branch / Micro/Nano Actuators and Microsystems Branch of Chinese Society of Micro-Nano Technology.

Abstract:Flexible electronics features ultra thin, large size, high precision and stretchability, bringing new technical challenges to manufacturing, while spraying can effectively make up for the deficiencies of the traditional electronics manufacturing technology in the large-area manufacturing of micro-nano structure, thus becoming twin manufacturing technology of flexible display. This presentation introduces the research progress in the manufacturing principles, technologies and equipment of flexible electronics printing, including flexible electronics manufacturing technology needs and transformative manufacturing technology, E-jet printing manufacturing principle and mechanism modeling, realization of advanced printing manufacturing processes and functionalities and flexible electronics manufacturing equipment and applications, etc.. We will also systematically introduce the multi-mode printing of E-jet printing technology, multi-material printing, multi-dimensional printing, etc. To demonstrate the inevitable trend of it becoming the twin manufacturing technology of flexible electronics, which will provide support for the innovative application and industrial development of flexible electronics.

Biography:Research direction: bionic smart polymers, including high-strength and ultra-tough artificial spider silk, artificial muscles, flexible electronics, flexible refrigeration, etc. He has published more than 100 research papers in international academic SCI journals such as Science , Nat. Commun., Adv. Mater., etc. Among them, the research work on stretchable conductors in 2015 was selected as the 2015 global TOP 100 science stories by Discover Magazine in the US; in 2019, his work on "torsional refrigeration" developed a new method of torsional refrigeration, which greatly improved the refrigeration efficiency; the strength and toughness of the hydrogel fiber artificial spider silk are close to those of natural spider silk; a variety of smart fabrics have been developed based on a variety of fiber materials, etc. He has a number of articles on flexible 4health monitoring selected as cover articles, has been invited to write multiple reviews, authorized more than 10 Chinese patents, and made more than 40 invited reports at many domestic and foreign academic conferences. Website: https://liuzunfeng.nankai.edu.cn

Abstract: A new type of artificial-muscle fibers have been developed, and by adding twist, the length change of the fiber under humidity is amplified, and it is the first to develop smart responsive fabrics based on all-natural fiber materials such as silk with twisted structure. The artificial spider silk fiber with "twisted core-shell structure" was developed, which realized the multi-level structure of spider-like silk, and achieved the strength and toughness close to that of natural spider silk through organic polymer synthesis. The twisted structure reduces the entropy of the material and increases the refrigeration efficiency of the elastomer from 32% to 67%. A variety of elastic-thermal refrigeration materials based on twisted structure have been discovered, which expands the scope of solid-state refrigeration technology. An elastic conductor based on zero Poisson’s ratio pleat structure was developed, and the control of the conductive path was realized, and a resistive strain sensor with high linearity under 200% strain was prepared, which solved the problem of poor linearity under large deformation of resistive strain sensor. Based on this, an artificial muscle fiber with multi-level synergistic effect was constructed to simulate nerve conduction, strain sensing and drive.

Abstract:The ABX3-type perovskite structure appears to be a wonder for a wide spectrum of applications including piezo-, ferro-, antiferro-magnetism, antiferro-electricity, superconductivity, catalysis, etc. In particular, the organic-inorganic hybrid lead-halide-based perovskite has demonstrated amazing properties in photovoltaic, optoelectronic and photoelectronic applications. In only a few years since the solid-state perovskite solar cell was reported in 2012, its solar cell efficiency is approaching 27%, higher than all other thin film solar cells. In this talk, I’ll cover research and developments in my groups on perovskite solar cells, membranes and their application in photovoltaics. In particular, I’ll report our effort in scaling up fabrication. With support from industry, we have successfully designed and setup a pilot production line for square-meter size rigid panel and another for flexible roll-to-roll (R2R) deposition. In summary, solar module efficiency for 1200x650 (mm²) panel is over 18%. Figure 1 shows a lab-scale solar power plant installed with an assembly of 20 high-efficiency solar panels. We are pleasantly surprised by no detectable degradation observed over a period of about six months. Using the R2R continuous coating line, we are capable of depositing all functional films up to a hundred meter long, 350 mm in width. The unit area (175x175 mm²) solar cell efficiency is as high as 19.2%, integrated 1050*350 mm² module efficiency as high as 17.75%, all among the highest in the field.

Biology:Dr. Shengzhong Liu received his PhD from Northwestern University, USA in 1992. He is an RSC (Royal Society of Chemistry) Fellow. His H-index is 110 and i10-index over 350. Upon completing his postdoctoral research at Argonne National Laboratory in 1994, he joined high-tech industrial research, most notably on solar cells with Solarex/BP Solar and United Solar Ovonic. Professor Liu’s research focus includes nanomaterials, thin film materials, photovoltaic materials and solar cells. His major outcome in basic research has been published in scientific journals, including Science, Nature, Joule, Matter, Science Advances, Nature Communications, Advanced Materials, Energy & Environ. Sci., etc., 80 of them being enlisted in ESI’s "most cited paper" and “hot paper” lists. Many of his major inventions and patents have been converted into commercial technology and products. In 2011, he accepted a full-time professorship by Shaanxi Normal University and Dalian Institute of Chemical Physics, Chinese Academy of Sciences in 2012. He is now the director of Shaanxi Engineering Lab for Advanced Energy Technology, Shaanxi Key Laboratory for Advanced Energy Devices and Institute for Advanced Energy Materials, Shaanxi Normal University and Associate Director of Solar Energy Department, Dalian National Laboratory for Clean Energy. He serves as an associate Editor for NanoSelect. He is also an Editorial Board Member for Advanced Science, ACS Sustainable Chemistry & Engineering, J. Energy Chemistry and Scientific Report. He is selected as the top 1% most highly cited author by RSC and Clarivate Analytics. He is also among the “Top 2% Scientists Worldwide 2022”.

Biography:Xinge Yu is the Associate Director of Institute of Digital Medicine, City University of Hong Kong (CityU), Associate Director of Hong Kong Centre for Cerebro-cardiovascular Health Engineering; Member of the Hong Kong Young Academy of Sciences. He is the recipient of RGC Research Fellow, Innovators under 35 China (MIT Technology Review), NSFC Excellent Young Scientist Grant (Hong Kong & Macao), New Innovator of IEEE NanoMed, MINE Young Scientist Award, Gold Medal in the Inventions Geneva, CityU Outstanding Research Award, Stanford’s top 2% most highly cited scientists etc. Xinge Yu’s research group is focusing on skin-integrated electronics and systems for VR and biomedical applications. Dr. Yu is the Associate Editor and Editor Boards over 10 journals, such as Microsystem & NanoEngineering, Bio-Design and Manufacturing, IEEE Open Journal of Nanotechnology, etc. He has published 180 papers in Nature, Nature Materials, Nature Electronics etc., and 50 patents filed/granted.

Abstract: Soft bio-integrated electronics have attracted great attentions due to the advantages of soft, lightweight, ultrathin architecture, and stretchable/bendable, thus has the potential to apply in various areas, especially in the field of biomedical engineering. By engineering the classes of materials processing and devices integration, the mechanical properties of the flexible electronics can well match the soft biological tissues to enable measuring bio signals and monitoring human body health.

In this report, we will present materials, device structures, power delivery strategies and communication schemes as the basis for novel soft bio-integrated electronics. For instance, we will discuss a wireless, battery-free platform of electronic systems and haptic interfaces capable of softly laminating onto the skin to communicate information via spatio-temporally programmable patterns of localized mechanical vibrations. The resulting technology, which we refer as epidermal VR, creates many opportunities where the skin provides an electronically programmable communication and sensory input channel to the body, as demonstrated through example applications in social media/personal engagement, prosthetic control/feedback and gaming/entertainment. Other demonstrations will include skin-interfaces human machine interface for robotic VR, skin like patches as sensors for healthcare monitoring and energy harvesting, etc.

Biography: L. Jay Guo is a Professor of Electrical and Computer Engineering at the University of Michigan. His is involved in interdisciplinary research, with activities ranging from polymer-based photonic devices and sensor applications, flexible transparent conductors, nanophotonics, structural colors and AI assisted design, hybrid photovoltaics and photodetectors, to nanomanufacturing technologies, and are contributed by students from Electrical Engineering and Optics, Macromolecular Science & Engineering, Applied Physics, Physics, and Mechanical Engineering. Prof. Guo has over 285 journal publications; with citation over 32,000 times, and an H-index of 89 (by google scholar). Some notable awards he received from recent years include 2023 Wise-Najafi Prize for Engineering Excellence in the Miniature World from University of Michigan, 2017 William Mong Distinguished Lecturer in Hong Kong University, and 2015 Monroe-Brown Research Excellence Award by the College of Engineering of University of Michigan. His professional service includes Associate Editor of Optica (till 2021); and currently member of the Editorial Advisory Board of Advanced Optical Materials, and Opto-electric Science. His entrepreneur activities include co-founding two startup companies to commercialize technologies from his lab. 

Abstract:An ultra-thin metal based flexible transparent conductor was developed to offer advantages such as flexibility, low temperature processing, high electrical conductance and optical transmittance that can be tailored for different applications. It has already been applied to several types of optoelectronic devices, such as touch panels, electrochromic window, OLED and PVs. When used as transparent anode for OLED, it addresses a long-standing challenge of light trapping in OLED, which limits the device outcoupling efficiencies. In contrast to the commonly used ITO that has the highest refractive index within the OLED layer stack, thin-Ag based transparent anode can eliminate the waveguide mode, thereby liberating the light that otherwise trapped within the OLED layers. Its high conductance makes it ideal for large screen multi-touch applications. The transparent metal electrode can be advantageously applied to OPV by virtue of its low sheet resistance and adjustable reflectivity; and is also shown as a promising transparent conductor for perovskite PVs, promising cost advantages. It is also compatible with moisture barrier coating on plastic substrate, together the two can account for more than half of the material cost for future flexible perovskite PVs.

Biography:Xiangjian Wan is Professor of the School of Chemistry, Nankai University. He graduated from Northeast Normal University in 2000, received his M.S. degree from Dalian University of Technology in 2003, and received his Ph.D. degree from Nankai University in 2006, and has stayed in Nankai University since then. He was awarded the National Outstanding Youth Fund Recipient in 2014, one of the 100 Young Academic Leaders of Nankai University in 2015, the Outstanding Youth Fund of Tianjin in 2017, the Second Prize of National Natural Science (as the Second Accomplisher) in 2018, and the National Science Fund for Distinguished Young Scholars in 2020. His main research interests include organic solar cell materials and devices. In recent years, he has published more than 100 papers in Science, Nature Photon., Adv. Mater., Andrew, J. Am. Chem. Soc. and other journals, with more than 10,000 citations, and has been selected as a Global Highly Cited Scholar in 2019-2023 identified by Clarivate.

Abstract: Aiming to improve efficiency, stability and bending resistance of flexible organic solar cells, we started with flexible transparent electrodes and interfacial materials. Firstly, we obtained silver nanowire conductive ink uniformly dispersed in water by electrostatic repulsion strategy, on the basis of which, we used ethylcellulose as a flexible substrate to obtain high-performance bending-resistant flexible transparent electrodes. In order to improve the efficiency and stability of flexible devices, we developed a series of interface modification materials, combined with the above flexible transparent electrodes, to prepare flexible photovoltaic devices with an efficiency approximating 19% and desirable light stability and bending resistance at the same time.

Biograph:Feng Liu is a Distinguished Professor at Shanghai Jiao Tong University and a recipient of the National Young Thousand Talents Program Award and the National Science Fund for Distinguished Young Scholars. His primary research areas include polymer physics, synchrotron small-angle/wide-angle scattering techniques, resonant soft X-ray scattering techniques, non-equilibrium thin film morphology, and functional perfluoropolymer thin films. To date, he has published over 400 papers in prestigious academic journals, including “Nature Materials”, “Nature Energy”, and “Advanced Materials”, with more than 32,000 citations. He has been recognized as a Clarivate Highly Cited Researcher for six consecutive years and has received numerous honors, including the First Prize of the China Petrochemical Federation, the Lawrence Berkeley National Laboratory Highlight Award, and the Zhishe Annual Emerging Scholar Special Award.

Abstract:The nanometer-scale interpenetrating network of organic solar cells forms the foundation for organic photovoltaics. An ideal morphology of the active layer features phase separation at multiple length scales: small-scale phase separation ensures sufficient generation of photoexcited excitons, while large-scale phase separation serves as rapid transport pathways for charge carriers. This resolves the conflict between exciton generation and charge carrier transport needs within the interpenetrating network. The rigid conjugated backbone of conjugated polymers induces chain stacking via π-π interactions, forming crystalline domains. These crystalline domains link together to create a fibrous morphology, where elongated crystalline fibers serve as ideal charge transport structures. The banana-shaped skeleton of Y6-type non-fullerene acceptors, along with their π-π interactions, leads to the formation of polymer-like conjugated molecular chains, which eventually arrange into an ordered two-dimensional electron transport network. By optimizing the size and density of the fibers, it is possible to balance the diffusion lengths of excitons and charge carriers at the donor-acceptor interface, better adapting the transport properties, reducing recombination rates, and achieving breakthroughs in device performance. 

Biography: Ye Long is Professor of Excellence and Ph.D. Supervisor at Tianjin University, recognized as National High-level Young Talent (2020) and Tianjin Distinguished Young Scholar (2023). His research focuses on the characterization and regulation of condensed state structures in polymeric optoelectronic functional materials, as well as stretchable optoelectronic devices and related testing equipment. He has led the national key R&D projects and other national-level fundamental enhancement programs. He has published over 100 papers as the first or corresponding author in prestigious journals such as Nature Mater., Joule, and Adv. Mater., with over 21,000 citations and an H-index of 73. He has been selected as one of the world’s most highly cited scientist for five consecutive years.

Abstract:This presentation will explore the analysis of aggregated structures in optoelectronic functional polymer materials and their applications in emerging optoelectronic devices. The focus will be on how to leverage the unique advantages of China’s large scientific facilities, such as synchrotron radiation and neutron sources, to analyze the multi-scale aggregate structures of materials, thus understanding and optimizing their performance. The presentation will first introduce the principles of analyzing aggregated structures in polymeric optoelectronic materials, followed by an in-depth analysis of molecular arrangement and interactions in solution and thin-film states of these material systems, revealing their effects on the optoelectronic and mechanical properties of blended films. The latest cases from 2024 will demonstrate the critical role of aggregate structure regulation in tuning the performance of various devices, along with new advances in stretchable photovoltaic cells and stretchable testing equipment.

Biology:Lie Chen, Second-level Professor, is currently Deputy Dean of School of Chemistry, Nanchang University. She’s selected as High-end Scientific and Technological Talent of "Thousand Talents Program" of Jiangxi Province, member of Hundred-Thousand-Ten Thousand Talents Program of Jiangxi Province, recipient of special allowance from Jiangxi Provincial Government, candidate for Ganpo Elite 555 Project of Jiangxi Province, academic and technological leader of major disciplines in Jiangxi Province, Jiangxi Young Scientist and winner of the Youth May Fourth Medal of Jiangxi Province. Currently, she is mainly engaged in the research of functional polymer and organic optoelectronic materials and devices. The results of her research have been published in more than 200 high-level academic papers in authoritative journals such as Adv. Mater.,  Angew. Chem. Int. Ed. and Energy Environ. Sci., etc. Besides, she has applied for more than 10 invention patents. She has won 1 Second-class Award in the Natural Science category in the Higher Education Awards of the Ministry of Education, 5 Natural Science Awards of Jiangxi Province, and 3 Scientific and Technological Achievement Awards of Colleges and Universities in Jiangxi Province. He has chaired 7 projects of the National Natural Science Foundation of China.

Abstract:In recent years, organic solar cells have attracted broad attention because of their light weight, low cost and large-area printing. The molecular structure of the organic solar cells’ active layer and the regulation of the phase morphology of the active layer blending system are key challenges faced by organic solar cells’ performance regulation. In this paper, simple strategies such as oligomer assistance and ferroelectric polymers are used to regulate the performance of organic solar cells, and the mechanism how the above strategies work on the active layer’s morphology, the devices’ photovoltaic performance, green non-halogen processing, large-area processing, stability, flexible device and translucent device are studied so that the efficiency of the prepared device can be increased to 19.40%, and the homogeneity as well as the stability of large-area film can be effectively improved.

Biography:Yongzhen Wu is Professor and Doctoral Supervisor at East China University of Science and Technology. His main research field is organic optoelectronic functional materials. So far, he has published more than 100 research papers in journals such as Science, Angew. Chem. Int. Ed., Adv. Mater. and Mater, etc. with more than 14,000 SCI citations. He was selected as a Clarivate Highly Cited Researcher from 2019 to 2023. He has won one second prize of the National Natural Science Award and the Youth Chemist Award of the Chinese Chemical Society. He has been selected into Shanghai Oriental Scholar, Young Talent Lifting Project of the Chinese Chemical Society, National Science Fund for Excellent Young Scholars of the National Science Foundation of China of the National Science Committee and National Science Fund for Distinguished Young Scientists of the National Science Foundation of the National Science Committee.

Abstract:Due to their unique optical properties, circularly polarized luminescent (CPL) materials have great application potential in the fields of three-dimensional display, information encryption and anti-counterfeiting, and biosensing, etc. The realization of multi-color CPL has potential application value for optical storage and optical communication. At the same time, the development of flexible films with excellent circularly polarized luminescence performance, strong mechanical deformation ability and high stability is an important frontier in the fields of wearable devices and flexible electronic devices. At present, there are still some problems in the technology to realize CPL of flexible films, such as low asymmetry factor (glum), difficulty in meeting the actual needs of luminous efficiency, and poor mechanical reliability. This report first introduces the innovative strategy that combines perovskite and chiral liquid crystal system and uses double-layer stacking to achieve high-performance CPL, and further introduces perovskite nanocrystals into the polymer matrix and adds appropriate additives to obtain a polymer-wrapped perovskite film with high fluorescence quantum yield (PLQY), which is used as the light source, with polymerizable chiral liquid crystal as the circularly polarized light modulation layer, to construct flexible multicolor perovskite-liquid crystal polymer (PeLCP) composite films with high performance through a simple strategy of double-layer stacking. It has an ultra-high GLUM value (1.81), excellent bending performance and stability, and is integrated with commercial chips to build electro-induced CPL transmitters.

Biography: Professor at Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, selected into the National Talents Program, Founder and Chief Scientist of Wuhan Jiuyao Optoelectronics Technology Co., Ltd. He has long been engaged in the basic research of the application of perovskite solar cells (PSC), and is an important pioneer, continuous innovator and industrialization practitioner of the inverted PSC technology route. After publishing the world is first Science paper on inverted PSC and the first record of the feed-in-table efficiency in 2015. In recent years, through researches on the passivation of defects in the highly photothermally stabilized FACsPbI3 perovskite, novel molecular interface materials, large-area perovskite coating film-forming mechanism, unique Bi-based inert metal electrode system, and construction of domain restricted reaction system based on multiple barrier films, he has effectively improved the efficiency and stability of basic certification of inverted PSCs. Many certified efficiencies have exceeded or tied the current world record, with stability certified by the third party. He has published more than 130 papers in Science, Nature, Nature Energy and other important academic journals. Many research results have been put into pilot run and market applications.

Abstract:With the industry is continuous investment in R&D, the foundation for the industrial application of perovskite solar cells (PSCs) has preliminarily taken shape today. As inverted PSCs is an important direction for technological industrialization, it is of great significance to sort out its origins, key development nodes and future development direction. The Presenter, with his long-term engagement in the basic research of inverted PSCs application and active exploration of possible approaches to overcome the bottleneck of industrialization, will display altogether the key achievements made throughout the years. He will also share an outlook on the development roadmap of the Wuhan Jiuyao Optoelectronics Technology Co. Ltd.

Biography:Professor, Doctoral Supervisor and Dean of School of Institute of Flexible Electronics (Future Technology) / Institute of Advanced Materials, Professor, Doctoral Supervisor, Dean. He is a recipient of the National Science Fund for Distinguished Young Scholars, Overseas High-level Young Talent, Distinguished Professor of Jiangsu Province, and Winner of Jiangsu Outstanding Youth Fund. He has long been engaged in the research of perovskite photoelectric conversion materials and devices. In recent years, he has published more than 180 SCI papers, including Nature, Science, Nature Energy, Nature Photonics, etc., and has applied for / been authorized 50 patents in China and 2 patents in the US. He has won the Youth Award for Outstanding Contribution to Science and Technology of China Petroleum and Chemical Industry Federation, and the first prize of Science and Technology Award of the China Institute of Electronics (ranked second). His research results were selected as "Top Ten Scientific and Technological Advances in China’s Higher Education Institutions" and Top Ten Scientific and Technological Advances in the Industry (Fundamental Research Field) of Jiangsu Province. He has lead a number of national, provincial and ministerial level and enterprise-level horizontal projects.

Abstract:Perovskite photovoltaic cells are an important part of future energy, and one of the biggest features that distinguishes them from traditional photovoltaic cells is their low-temperature solution processability, and the importance of solvents is self-evident, which have to be green, pollution-free, air-ready and easy to operate. We have developed a series of novel ionic liquid solvents (such as methylamine acetate MAAc, butylamine acetate BAAc, methylamine formate MAFa, etc.) to prepare perovskite thin films in air and obtain efficient and stable perovskite solar cells, breaking the limitations of the traditional use of highly toxic and strongly coordinated proton solvents such as DMF, DMSO, NMP, etc. Based on the ionic liquid solvent system, we have developed a new technique of screenprinting perovskite thin films, which realizes the high-speed large-scale preparation of photovoltaic cells in air.

Abstract:Flexible perovskite solar cells are expected to be used in a variety of key military and national economic fields, such as aerospace, drones, consumer electronics, electric vehicles, and photovoltaic buildings, owing to their merits of light weight, low cost, and bendability, etc. At present, there is still a large gap between the photoelectric conversion efficiency of flexible single-junction perovskite solar cells and that of rigid single-junction perovskite cells. One of the main reasons for the limited performance of flexible perovskite cells is that the performance of the carrier transport layer itself is not high enough as a result of the low-temperature processing technology required by the flexible substrate, plus there’s a serious non-radiative recombination with the perovskite layer at the interface. In addition, the theoretical efficiency limitation of the single-junction device structure itself is not conducive to further improvement of the performance of flexible perovskite cells, while the construction of a tandem device structure is more favorable to making breakthrough in flexible device performance. In this work, we use two hole-selective molecules (2PACz and MeO-2PACz) with different dipole moments based on carbazole and phosphate groups to form a hybrid self-assembled monolayer to connect the perovskite layer and the hole transport layer of nanocrystalline nickel oxide. It is found that this hybrid self-assembled monolayer can effectively adjust the energy-level alignment of the interface, reduce the non-radiative recombination of the interface, and promote the extraction of hole carriers, thereby significantly improving the photovoltaic performance of flexible devices. The flexible all-perovskite tandem cell (0.049 cm²) prepared by us exhibits a champion efficiency of 24.7% (internationally certified efficiency of 24.4%), which is the highest efficiency of flexible perovskite solar cells at the time of reporting. At the same time, we have also fabricated a flexible all-perovskite tandem cell with a larger device area (1.05 cm²), which exhibits a champion efficiency of 23.5%. Besides, the flexible device with a molecular bridging interface also exhibits significantly improved bending resistance and maintains its initial photovoltaic performance after 10,000 bends with a rending radius of curvature of 15 mm. The molecular bridging interface and tandem device structure will open up a new path for the realization of high-efficiency flexible perovskite cells and modules.

Biograph:Pavel Troshin is currently full professor at Zhengzhou Research Institute, Harbin Institute of Technology, China and also serves as a Head of the Laboratory of Functional Materials for Electronics and Medicine (FMEM Lab) at FRC PCP MC, Russian Academy of Sciences and He received his PhD degree from IPCP RAS in 2006 and pursued his research career at Russian Academy of Sciences. He was also appointed as associate professor and then full professor at Skolkovo Institute of Science and Technology in 2015-2020 and elected as ERA Chair Professor for Organic Electronics at Silesian University of Technology in 2021. His research interests cover materials science, solar energy conversion (perovskite and organic solar cells), electrochemical energy storage, organic and molecular electronics, organic synthesis, biomedical and fullerene chemistry. 

Abstract:Light weight, high efficiency and good radiation hardness are the primary requirements for the application of solar panels for space missions. Multiple reports have shown that both organic (OPV) and perovskite solar cells (PSCs) could successfully tolerate high doses of ionizing radiation and outperform in that context conventional crystalline Si and A3B5 types of PV cells. Furthermore, both OPV and PSCs could be flexible and rollable, which is a great benefit in terms of panel transportation costs.

Herein, we will shortly discuss the current state of the art in the field of emerging PV technologies for space applications and then present our research results for a series of organic and perovskite absorber materials. We will show that both types of materials could tolerate ultra-high doses of gamma rays approaching 10-20 MGy, which open wide opportunities for their use in space missions. We will discuss previously unknown degradation pathways of the materials induced by gamma rays and UV light, which are sometimes quite exotic and lead to unusual products. Finally, we will present preliminary results on the radiation hardness of completed organic and perovskite solar cells and outline prospects for future development of this exciting area of research.

Biography:Song Yin graduated from College of Physical Science and Technology, Hebei University in 2020 with a bachelor’s degree in Electronic Information Science and Technology. He graduated from the School of Physical Science and Technology of Hebei University with a master’s degree in Optical engineering in 2024.

Abstract:Device flexibility is a trend in the development of electronic products, and high quality functional films are an indispensable part of microelectronic devices. At present, magnetron sputtering and vacuum evaporation are two mature and efficient thin film deposition technologies, which have been widely used in scientific research and industrial production. For flexible devices, due to the particularity of substrate materials, folding and poor binding force are easy to occur in the process of film deposition. Our company has mature experience in winding design, the use of roller sets with correction function, through the control of line speed to ensure that the substrate walking smooth, uniform speed, speed controllable, to avoid wrinkles in the coating process. At the same time, the ion source is bombarded with degassing to reduce the impurity gas on the substrate surface and improve the binding force between the film and the substrate. It is helpful for the preparation of high quality functional films on flexible substrates.

Biography:Zhiyong Fan is a Chair Professor in the Departments of Electronic and Computer Engineering and Chemical and Biological Engineering at the Hong Kong University of Science and Technology (HKUST). He serves as the Co-Director of the State Key Laboratory on Advanced Displays and Optoelectronics Technologies (Ministry of Science and Technology), Founding Director of the HKUST Center for Intelligent Sensors and Environmental Technologies, and Deputy Director of the Materials Characterization and Preparation Facility at HKUST.

He is a Fellow of the Optical Society of America (FOSA), a Fellow of the Royal Society of Chemistry (FRSC), and a Senior Member of IEEE. He is also a Founding Member of the Hong Kong Young Academy of Sciences and the Deputy Secretary-General of the Nanomaterials and Devices Division of the Chinese Materials Research Society.

He earned his bachelor’s and master’s degrees from Fudan University’s Department of Materials Science and a Ph.D. in Materials Science from the University of California, Irvine. He worked as a postdoctoral researcher at both the University of California Berkeley’s Department of Electrical Engineering and Computer Sciences and Lawrence Berkeley National Laboratory. He has received several prestigious awards, including the BSAC Outstanding Research Presentation Award from the University of California, HKUST Engineering Young Investigator Award, HKUST School of Engineering Research Excellence Award, HKUST President’s Award, and Innovation Award. Additionally, he has won the Shandong Province Natural Science Second Prize, one of the 2020 China Semiconductor Top 10 Advances, the 2022 Tencent Science Explorer Award, and the inaugural 2022 Bank of China (Hong Kong) Science and Technology Innovation Award.

His research focuses on micro- and nano-electronic and optoelectronic devices, as well as bioinspired devices. To date, he has published around 260 academic papers in journals such as “Nature”, “Nature Electronics”, “Nature Photonics” “Nature Materials”, and “Science Robotics”. His work has been cited approximately 30,000 times, with an H-index of 91, and he holds over 30 patents in China and the United States.

Abstract:Metal halide perovskite materials have garnered widespread attention for their excellent light absorption, long carrier diffusion length, and tunable composition, making them promising candidates for high-performance optoelectronic applications such as solar cells, photodetectors, and light-emitting diodes (LEDs). This presentation summarizes the results from our research group, which employed chemical vapor deposition (CVD) to grow well-aligned, high-density arrays of perovskite nanowires (NW) and quantum wires (QW) in nano-engineered templates for optoelectronic device applications. These devices include curved, biomimetic retinas and flexible LEDs. Additionally, we have developed full-color perovskite image sensors based on solution printing techniques, with thin-film transistor arrays as the driving circuits. These results demonstrate the versatility of perovskite material preparation methods and the broad applications of micro- and nano-structures in the field of optoelectronics.

Biography:Prof. Inkyu Park received his B.S., M.S., and Ph.D. from KAIST (1998), UIUC (2003) and UC Berkeley (2007), respectively, all in mechanical engineering. He has been with the department of mechanical engineering at KAIST since 2009 as a faculty member and is currently a full professor and KAIST Endowed Chair Professor. His research interests are micro/nano-fabrication, smart sensors for healthcare, robotics, metaverse, and environmental and biomedical monitoring, and nanomaterial-based sensors and flexible & wearable electronics. He has published more than 195 international journal articles (SCI indexed) and holds more than 50 registered domestic and international patents in the area of MEMS/NANO engineering. He is a recipient of HP Open Innovation Research Award (2009-2012), KAIST Prize for Academic Excellence (2021), KAIST Grand Prize for Technology Innovation Award (2019), KAIST Endowed Chair Professorship (2017), Nanotechnologies Top 10 of Korea (2023), and NanoKorea 2023 Research Innovation Award – Korean MIST Minster Award (2023). He is currently an editor for Sensors and Actuators B: Chemical, one of the top SCI journals in the sensor technology field.

Abstract: Smart healthcare technology and wearable sensors revolutionize patient care by providing continuous, real-time health monitoring, enabling early detection of potential health issues. They empower individuals with actionable insights into their own health, fostering preventative care and personalized healthcare strategies. By integrating smart materials and sensors, these technologies enhance the responsiveness and efficacy of healthcare interventions. Furthermore, wearable devices facilitate a seamless connection between patients and healthcare providers, improving healthcare delivery and outcomes through data-driven decisions. In this talk, we discuss the micro/nanostructure-based wearable sensors for smart healthcare applications including self-powered, mechanical metamaterial-based highly stretchable strain sensors for exercise monitoring; porous elastomer – carbon nanotube (CNT) composite based, large dynamic range pressure sensors for wrist pulse, motion and posture monitoring; micro/nano-hierarchical structure-based pressure sensors for smart wristband to prevent carpal tunnel syndrome (CTS) ; and near field communication (NFC) based wireless, battery-free pressure/temperature/humidity sensors for the patient monitoring to prevent pressure injury, which were recently developed at our research group.

Biography:Zhou Li, Researcher and Ph.D. Advisor, is a recipient of the National Science Fund for Distinguished Young Scholars. He serves as Assistant Director of the Beijing Institute of Nanoenergy and Nanosystems and Head of the Nanoenergy Department at the School of Nanoscience and Technology, University of Chinese Academy of Sciences.

He is a council member and Deputy Chair of the Youth Committee of the Chinese Society of Biomedical Engineering, Deputy Chair of the Life Electronics Subcommittee of the Chinese Institute of Electronics and Deputy Chair of the Smart Materials and Devices Subcommittee of the Chinese Materials Research Society. He is also an expert in the "14th Five-Year Plan" Key R&D Program for sensor projects, under the Ministry of Science and Technology, and a Special Reviewer for Innovative Medical Devices at the China Food and Drug Administration (CFDA).

Dr. Li’s research focuses on bioelectronic devices, implantable/wearable electronic medical devices, biosensors, and cellular biomechanics. He has published over 270 papers, including 15 papers in sub-journals of “Nature”, “Cell”, and “Science”. Three of these papers rank in the top 0.1% of ESI’s most cited papers, and 30 are among the top 1% of highly cited papers, with more than 20,000 citations in total, achieving an H-index of 78.

He is the Editor-in-Chief or Associate Editor for “MedMat”, “Micro” and “Smart Materials in Medicine”, and the Associate Editor of “Science Bulletin”. Dr. Li has received numerous accolades, including the Beijing Science and Technology Award (First Prize, as the lead contributor), the International Federation for Medical and Biological Engineering (IFMBE) Young Scientist Award, the China Invention Association’s Gold Award, the National Science Fund for Distinguished Young Scholars, and the Beijing Science Fund for Distinguished Young Scholars. Additionally, he was selected for the National Ten Thousand Young Talents Program, the Ministry of Education’s New Century Excellent Talents Program, and the Beijing High-Level Innovation and Talent Program.

Abstract:Biosensors can monitor physiological and physical conditions, providing users and medical personnel with data and diagnostic insights. Self-powered technology significantly enhances the endurance of biosensors, offering a novel approach for their development. Nano-generators, a type of advanced force-electricity converter, can supply energy for sensors or function as self-powered mechanical sensors, boasting advantages like a wide range of material choices and high output voltage. Based on nano-generator technology, we have developed highly sensitive intelligent biosensor devices and systems.

On one hand, we utilize nano-generators to monitor signals such as respiration, pulse, and sweat, creating a wearable physiological signal monitoring system. Additionally, by delivering miniature flexible nano-generators into the heart chamber via catheters, we achieved in-situ measurements of intracardiac pressure. On the other hand, we designed various flexible bio-inspired nano-generators that, combined with artificial intelligence, can recognize complex movements and gestures. This research, centered around self-powered technology and biosensors, shows great potential for clinical applications and commercialization.

Biograph:Professor Wentao Xu is a Distinguished Professor and Ph.D. supervisor at Nankai University. He has been awarded several prestigious talent programs, including the National Science Fund for Distinguished Young Scholars, National High-Level Overseas Talent Recruitment, Tianjin Haihe Elite Talent Program Leading Talent, and Tianjin Distinguished Young Scholar. He has received numerous honors, including the First Prize of the Tianjin Natural Science Award (as the first contributor) and the Special Prize of the Tianjin Teaching Achievement Award. Xu has led major national R&D projects, such as key intergovernmental cooperation projects under the National Key R&D Program and nanotechnology frontier projects.

Professor Xu is a Fellow of the Royal Society of Chemistry (FRSC) and serves as an editorial board member for international journals, including “Cyborg and Bionic Systems”, a sister journal of “Science”. His research focuses on flexible neuro-bionic electronics, where he introduced the concept and developed the world’s first artificial afferent tactile nerve. As the corresponding or first author, he has published over 100 papers in top-tier international journals such as “Science”, “Science Advances”, “Nature Communications, and “Advanced Materials”, and has applied for more than 40 patents.

Abstract:The flexible artificial nervous system is an advanced electronic technology that mimics the structure and function of human nerves, offering advantages such as parallelism, distribution, and event-driven processing. This technology holds great significance for advancing treatments for neurodegenerative diseases and for the repair and replacement of damaged nerves. The presentation will cover the application of neuro-bionic principles, the development of flexible materials, the fabrication of multimodal sensing devices, and the integration of biological functions. By employing nano-scale, high-precision fiber wiring techniques, the research team has developed flexible artificial afferent and efferent nervous systems, aiming to overcome the bio-electronic interface and explore biologically compatible electronic cognitive circuits.

Biography: Prof. Fushan Li is engaged in the technology researches of information optoelectronic materials and devices, and has received project setup support from the National Key Research and Development Program of China and the National Natural Science Foundation of China as Project Leader. He has published more than 150 peer-reviewed papers in Nature Photonics and other journals, and has been authorized 28 invention patents in China. In 2022, he won the First Prize of the Science and Technology Awards of China Materials Research Society (ranking the first), and the Second Prize of Optical Science and Technology Award of the Chinese Optical Society (ranking the first). In 2022, his research result was selected as one of the Top Ten Events with the Greatest Social Impact in China’s Optics Industry, and was nominated for the Award for China’s Top Ten Greatest Progresses in Optics .

Abstract: Quantum dots, as a new generation of light-emitting materials that have attracted attention in recent years, features multiple advantages such as narrow-band emission spectrum, high-fluorescence efficiency, continuously tunable emission spectrum, and solution processability, demonstrating a wide range of applications in fields such as displays, lighting, and biomarkers, etc. In this presentation, we utilize a novel self-assembly printing and fabrication technique to achieve high-quality patterned films of quantum dots at the micro/nanoscale level, with focus on the controlled transport and assembly strategy of quantum dots in the printing process, as well as the charge transport mechanism in quantum dot light-emitting devices, based on which the quantum-dot nanopixel element light-emitting display technology has been developed to tackle multiple challenges met by future ultra-high resolution display applications.

Biography: Research interests include: research on organic polymer optoelectronic materials and intrinsically flexible devices. Proposed receptor modulation and heteroatom doping strategies to obtain high-mobility polymer semiconductor materials; utilizing the principle of coaxial printing, independently constructed high-precision processing equipment with the solution approach and applied it to the preparation of intrinsically flexible drive and light-emitting device arrays, and realized the organic integration of mechanical-optical-electrical properties. Published 16 SCI articles as the first / co-authors / corresponding authors from 2016 to now, including Adv. Mater. . Am. Chem. Soc., Chem., NSR, etc. She won the support by the Postdoctoral Innovation Talents Support Program in 2017 and awarded the First Prize of Beijing Science and Technology Award (ranking 7th).

Abstract: Coaxial electrohydrodynamic jet printing technology has been used to fabricate organic polymer semiconductors at the micro- and nano-scale large-area printing with a linear array structure of resolution up to 90 nm. By introducing electrodes in liquid form to neutralize the residual charge during the printing process, the integration of polymer thin-film transistors (PTFTs) arrays on wafer-scale rigid, intrinsically flexible substrates with stable, high-resolution, and homogeneous performances have been successfully realized. Low roughness stretchable AgNW electrodes were prepared by E-jet printing, and the first 12*12 array of intrinsically flexible polymer light-emitting diode (PLED) array was prepared by combining with novel polymer composite light-emitting films, with max. luminance and external quantum efficiency reaching 21072 Cd/m2 and 3.13%, respectively, which are the highest values reported so far.

Biograph:Xuewen Wang is a Professor and Ph.D. supervisor at Northwestern Polytechnical University, a recipient of national-level young talent awards, and the Deputy Director of the Institute of Flexible Electronics and the Shaanxi Provincial Key Laboratory of Flexible Electronics. He also serves as the Director of the Shaanxi Provincial Engineering Center for Flexible Electronics in Higher Education Institutions. His research focuses on the development of specialized flexible electronics and intelligent sensing technologies. Professor Wang has led over ten projects, including those under the National Key R&D Program and the National Natural Science Foundation of China, as well as key projects in Shaanxi Province. He has published more than 100 academic papers in prestigious international journals such as “Nature Communications”, “Science Advances”, “Advanced Materials”, and “Journal of the American Chemical Society (JACS)”. He holds 15 authorized Chinese invention patents and 1 U.S. patent. His research achievements have been featured in mainstream media, including Xinhua News Agency, China Central Television (CCTV), and “Science and Technology Daily”.

Professor Wang serves as an expert on the National Key Program’s General Expert Group, a member of the National Standardization Technical Committee, and an editorial board member, youth editor, or guest editor for several leading academic journals, including “FlexMat”, “InfoMat”, and “Science China: Materials”. He is a Northwestern Polytechnical University "Soaring Young Scholar" and "Soaring Overseas Scholar," a recipient of the Wu Yajun Outstanding Young Teacher Grand Prize, and has been named a Rising Star by the “Royal Society of Chemistry’s Nanoscale”, a "Rising Star in Materials" by the American Chemical Society, and listed among the world’s top 2% of scientists.

Abstract: Specialized flexible sensing devices are key components of next-generation strategic and forward-looking information devices. Due to their characteristics of being lightweight, thin, flexible, and transparent, flexible sensing devices have diverse application scenarios. In particular, they are expected to play a significant role in supporting major national strategies, such as aerospace propulsion, hypersonic flight, and deep space exploration. However, a major challenge in this field is how to achieve highly stable, multimodal, and cross-temperature-range flexible sensing in extreme environments.

To address this challenge, the speaker will present the research team’s achievements in three areas related to specialized flexible sensing materials and devices:  

1. Development of rational design and performance regulation methods for two-dimensional sensing materials, expanding the variety of flexible sensing materials and achieving material diversification.  

2. Proposal of multi-material interface fusion strategies to enhance the mechanical performance and stability of flexible sensors.  

3. Development of integrated printing and fabrication methods to realize multimodal integration and cross-temperature-range sensing, thereby expanding system functionality.

The speaker will also analyze the challenges and opportunities faced by this field in the future.

Biography: Bowen Zhu is a Distinguished Researcher, Assistant Professor, and Ph.D. Supervisor at the School of Engineering, Westlake University. He received his BS degree from Jilin University in 2010, and Ph.D. from Nanyang Technological University, Singapore, in 2016. He conducted his postdoctoral research at the Department of Materials Science and Engineering, UCLA in 2016-2017. Then he joined Monash University Australia in 2017 as a Discovery Early Career Researcher Award (DECRA) fellow to conduct research in flexible and stretchable electronics at the Department of Chemical Engineering. In August 2019, he joined the School of Engineering, Westlake University as an independent PI and became the Head of the Flexible Electronics Laboratory, focusing on directions such as oxide thin film transistors, active drive array sensors, Mott memristors, etc. He has been subsidized by the National and Zhejiang Overseas High-level Talents Youth Program and Zhejiang Qianjiang Talents Program, and has been honored as one of the 35 People of Science and Technology Innovation in Asia-Pacific Region, MIT Technology Review. He has published more than 80 SCI papers in Nat. Commun., Adv. Mater., Adv. Funct. Mater., ACS Nano and other famous international journals and has been cited more than 8000 times.

Abstract:Flexible sensors (e.g., pressure, pH, temperature, chemical, biosensors, etc.) play an important role in applications such as electronic skin, human-machine interfaces, and health monitoring. Thin-film transistors (TFTs) are the core electronic components for building large-area, high-resolution, active-matrix flexible sensor arrays. In recent years, metal-oxide-semiconductor thin-film transistors, represented by IGZO, are promising for emerging applications in active-matrix flexible sensor arrays due to their high optical transparency, large-area uniformity and good electrical properties, and processes that allow them to be prepared at low temperatures or even room temperature. In this presentation, I will introduce our team’s approach to develop solution processed high-performance oxide semiconductor materials and thin-film transistor device. Meanwhile, thin-film transistor backplanes are a versatile platform that can be used to construct different sensing applications, such as tactile and photodetector arrays, etc. I will introduce how to use thin-film transistor backplanes to build relevant active matrix flexible sensor arrays.

Biography:Dr. Yulong Gao, after earning his bachelor’s, master’s and doctoral degrees from Harbin Institute of Technology, worked as Postdoctoral Fellow of Suzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese Academy of Sciences. He’s Inventor of the embedded nanoprinting technology, Founder & Chairman of Shine Optoelectronics (Kunshan) Co., Ltd., member of National Key Talent Project and winner of China Patent Gold Award. He owns 412 patents, including 286 authorized patents; he has received 144 invention authorizations, including 61 in China, 22 in the US, 23 in Taiwan, 21 in Korea and 10 in Japan. The invention patent "Graphic Flexible Transparent Conductive Films and its Fabrication Method" (Patent No. 201110058431.X) won the 16th China Patent Gold Award in November 2014, which is the first national patent gold award won by Jiangxi Province.

Abstract: The global electronics industry has embarked on the study of using additive manufacturing to replace photolithography in circuit manufacturing since the 1990s, such as screen printing, intaglio printing and inkjet printing. In 2010, the team of Suzhou NanoGrid Technology Co., Ltd. lead by Dr. Yulong Gao invented the new technology of preparing conductive circuits with embedded printing that achieved a printing resolution of 1.3 microns, based on which the manufacturing of flexible and transparent conductive films met large-scale application in the touchscreen industry. However, due to its dependency on silver ink, this technology has a setback that its resistivity after sintering is generally 6*10^-6 Ohm Meters, which is two orders of magnitude lower than that of pure copper (1.8*10^-8 Ohm Meters), while its cost is much higher than copper. In view that annual output of today’s printed circuit board (PCB) industry amounts to 700 billion RMB that has a high reliance on copper corrosion technology, green manufacturing of printed circuit boards at a low cost can only be achieved with a breakthrough in the additive manufacturing of pure copper. In 2015, Dr. Yulong Gao founded Shine Optoelectronics, where he and his R&D team finally realized the technological breakthrough in and commercialization of the embedded additive manufacturing of copper circuits through eight years of efforts and achieved a minimum copper circuit width of 500 nanometers. Today, the circuit boards made using this technology have been commercialized in the field of TV, and are heading toward more fields such as display, automotive and IC chip carrier.

Biography:Jiankui Chen, General Manager of Wuhan National Innovation Technology Optoelectronics Equipment Co., Ltd., Professor and Doctoral Supervisor of Huazhong University of Science and Technology. He is committed to the research on key technological breakthroughs, mechanism exploration, intelligent algorithm and equipment development in the fields of flexible electronics manufacturing and artificial intelligence. He has published more than 70 high-level papers on his research results and obtained over 160 national invention patents and 6 United States invention patents, etc. He has won 2 second prizes of the National Technology Invention Award, 1 second prize of the State Science and Technology Progress Award, and one Grand Prix (Special Gold Medal) and one Gold Medal at the International Exhibition of Inventions Geneva.

Abstract:As high flexibility, large area and high resolution have become the development trends of flexible electronics, it is a revolution in flexible electronic mass production and manufacturing technology to replace the traditional semiconductor process/vacuum process with inkjet printing. The flight of large-scale ink droplets is susceptible to systematic errors, substrate movement and airflow disturbance, and prone to produce patterned shape defects such as individual drops, skip-out and bridging, etc. In order to improve the mass production and resolution of large-area flexible electronic devices and suppress the occurrence of defects from the source, it is urgent to break through the bottleneck of the controllability of high-resolution droplet arrays; hence, our team has carried out continued research on the manufacturing equipment and technology of flexible electronic large-area patterned jet printing, and has achieved diversified stable applications.

Biography: Prof. Chaoyu Xiang, who won the title of Distinguished Young Scholars of Zhejiang Province in 2021, is a member of the Editorial Board of an international professional journal of information display, member of the Beijing Branch of Society for Information Display (SID), and member of the National Technical Committee 279 on Nanotechnology of Standardization Administration of China. He has participated as the project leader and/or participant in many scientific research projects such as key R&D programs of the 14th Five-Year Plan of China and key projects of the National Natural Science Foundation of China. As the first author/corresponding author, he has published more than 20 papers in domestic and foreign academic journals such as Nature Photonics and Nature Communications. He has also developed the world’s first prototype of 5-inch full-color AM-QLED and 31-inch full-color AM-QLED and formed a series of core device preparation technologies with independent intellectual property rights. He joined NIMTE CAS in 2019 as the team leader, where he established a QLED team with international competitiveness composed of experts from China, United States, Japan and other countries, including national QR, BR of CAS, Zhejiang Distinguished Young Scholars and other scientific research backbones.

Abstract: Lead halide perovskite nanocrystals are a luminescent material that is expected to be used in the next-generation display technologies that enables photoluminescence quantum yields close to 100%, narrow luminescence spectra, and easily tuneable luminescence wavelength. However, perovskite nanocrystals for light-emitting diodes are often synthesized through a displacement reaction that is difficult to control, resulting in low yields, uneven crystal growth, and poor stability. In order to synthesize high-quality perovskite nanocrystals for perovskite quantum dot (QD) light-emitting diodes, we propose a synthesis strategy for uniform growth and nucleation, which allows the control of nucleation and growth during synthesis by eliminating the nucleation-affecting clusters while inhibiting the overgrowth of Ostwald ripening to synthesize perovskite nanocrystals with narrow size distribution, few defects and highly controllable size. Specifically, we avoided the formation of PbX2 clusters by using Lewis acids and bases with relatively high dissociation coefficients as precursor ligands. After nucleation, a growth-inhibiting reagent is added to the synthesis system that also regulates the reaction equilibrium and passivates the nanocrystals. Through our synthesis strategy, the photoluminescence quantum yield and stability of red and green perovskite nanocrystals have been significantly improved and stable and efficient green and red lead halide perovskite nanocrystals were synthesized. The prepared QDs achieved an external quantum efficiency of 24.13% at 517/17 nm and 25.80% at 646/40 nm, and achieved pure red emission with an efficiency of 26.04%, with a luminous wavelength and an FWHM of 628/33 nm. The green perovskite LEDs achieved a record lifetime of 54 minutes at 10,000 cd/m², while the red perovskite LEDs had a 70-fold increase in stability, and the pure red perovskite QDs had a lifetime of 729 minutes at 1,000 cd/m2.

Biography:Ronald Österbacka obtained his Ph.D. in physics with distinction from Åbo Akademi University in 1999. During his Ph.D., he spent one year with Prof. Z. Valy Vardeny at the University of Utah. He did his PostDoc as an Academy of Finland research fellow and became a full professor in physics at Åbo Akademi University in 2005.

Österbacka holds a Suzhou Foreign Academician fellowship at the Printed Electronics Research Center, Suzhou Institute for Nano-tech and Nano-bionics. Österbacka is the recipient of the 2023 professor Theodore Homén’s prize awarded by the Finnish Society for Science and Letters.

Österbackas specialty area is electro-optical properties of disordered, organic materials. In particular, the charge transport and recombination in thin-film solar cells and the demonstration of novel solution-processable organic electronic devices.

Abstract:Emerging solar cells, such as perovskite solar cells (PSC) and organic photovoltaics (OPV), have seen a tremendous increase in power-conversion efficiencies over the last decade. Despite the fast development of the efficiencies, we need better understanding of detrimental non-radiative recombination pathways in order to enhance the overall efficiencies. Non-radiative recombination in any form, i.e. trap-assisted, or surface recombination of minority carriers at the (wrong) electrode will inevitably lead to lower efficiencies. However, given the fast development of the efficiencies, the stability of both PSCs and OPVs is still not satisfactory.

The challenge to suppress non-radiative recombination losses in OPVs and PSCs on their way to the radiative limit lies in proper energy level alignment and suppression of recombination from defects at interfaces, and contacts.

In this talk, I will discuss some recent strategies how we have approached contact-induced recombination in both PSC and OPV.

Biography:Dr. Lee received his Ph.D. degree from The University of Tokyo, Tokyo, Japan, in 1996. He is the GlobalFoundries Chair Professor in Engineering and director of the Center for Intelligent Sensors and MEMS at the National University of Singapore, Singapore. He co-founded Asia Pacific Microsystems, Inc. (APM) in 2001, where he was Vice President of R&D from 2001 to 2005. From 2006 to 2009, he was a Senior Member of the Technical Staff at the Institute of Microelectronics (IME), A-STAR, Singapore. His research interests include MEMS, NEMS, Nanophotonics, Si Photonics, metamaterials, energy harvesting, wearable sensors, flexible electronics, artificial intelligence of things (AIoT). He has trained 43+ Ph.D. students graduated from the ECE Dept., NUS. He has co-authored 500+ journal articles and 380+ conference papers. His Google Scholar citation is more than 36700. He is one of the 39 professors at NUS awarded Highly Cited Researcher Designations in 2023 (Clarivate). His D-index (Discipline H-index) ranks 300th among all electronics and electrical engineering scientists globally (Research.com, Dec. 2022).

Abstract:Artificial Intelligence (AI) has shown the power to enhance the functionality of sensors and enable intelligent human-machine interfaces through machine learning based data analysis. However, the good performance of AI is always accompanied by a large amount of data and high computational complexity. While cloud computing appears to be the right solution to this issue with the advent of the 5G era, a certain intelligence of the edge terminal is also important to make the entire integrated intelligent system more efficient. The current development of flexible sensor technologies pave the way to realize advanced AI sensors by leveraging artificial intelligence of things (AIoT) system. Hence, in this talk, the related progress in terms of flexible materials, device structures and applications of the wearable sensors and scalable flexible sensors are provided and discussed. The future research direction in-sensor computing technology will be provided in the end.