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Recent progress on stability and applications of flexible perovskite photodetectors

Journal of Semiconductors 2025年第1期46卷 5-19页

作者： Ying Hu Qianpeng Zhang Junchao Han Xinxin Lian Hualiang Lv Yu Pei Siqing Shen Yongli Liang Hao Hu Meng Chen Xiaoliang Mo Junhao Chu State Key Laboratory of Photovoltaic Science and Technology Shanghai Frontiers Science Research Base of Intelligent Optoelectronics and PerceptionDepartment of Materials ScienceInstitute of OptoelectronicsFudan UniversityShanghai 200433China Advanced Silicon Technology Co. Ltd.Shanghai 201616China

Flexible photodetectors have garnered significant attention by virtue of their potential applications in environmental monitoring,wearable healthcare,imaging sensing,and portable optical *** stand out as particularly promising materials for photodetectors,offering exceptional optoelectronic properties,tunable band gaps,low-temperature solution processing,and notable mechanical *** this review,we explore the latest progress in flexible perovskite photodetectors,emphasizing the strategies developed for photoactive materials and device structures to enhance optoelectronic performance and ***,we discuss typical applications of these devices and offer insights into future directions and potential applications.

关键词： perovskite flexible photodetector stability versatile applications

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Low-temperature conformal vacuum deposition of OLED devices using close-space sublimation

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Journal of Semiconductors 2023年第9期44卷 62-67页

作者： Bryan Siu Ting Tam Shou-Cheng Dong Ching W.Tang State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina Institute for Advanced Study The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

Close-space sublimation(CSS)has been demonstrated as an alternative vacuum deposition technique for fabricating organic light-emitting diodes(OLEDs).CSS utilizes a planar donor plate pre-coated with organic thin films as an area source to rapidly transfer the donor film to a device substrate at temperatures below 200℃.CSS is also conformal and capable of depositing on odd-shaped substrates using flexible donor *** evaporation behaviors of organic donor films under CSS were fully characterized using model OLED materials and CSS-deposited films exhibited comparable device performances in an OLED stack to films deposited by conventional point *** low temperature and conformal nature of CSS,along with its high material utilization and short process time,make it a promising method for fabricating flexible OLED displays.

关键词： close-space sublimation OLED thin film low temperature vacuum deposition

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Color-Conversion Liquid Crystal Display with In-Cell Polarizer

Color-Conversion Liquid Crystal Display with In-Cell Polariz...

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SID International Symposium Digest of Technical Papers, 2023

作者： Gao, Yi-Yang Cheng, Yue-Chu Tseng, Man-Chun Ho, Jacob Yeuk-Lung Vashchenko, Olena Tang, Shu-Tuen Vashchenko, Valerii Yeung, Fion Sze-Yan Srivastava, Abhishek Kwok, Hoi-Sing State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

An approach to developing a thin-film polarizer with high polarization efficiency in liquid crystal cells is presented. The in- cell polarizer facilitates the realization of novel color-conversion liquid crystal displays, where advanced quantum color-converters are used as photoluminescent color filter arrays. We experimentally demonstrated using azo-dye-based embedded polarizers for color-conversion liquid crystal displays for the first time. We systematically designed the device structure and fabrication process. The display is color parallax free and can be driven at regular conditions with good contrast. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Liquid crystal displays

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Large-FoV Fast LiDAR System based on Electrically Suppressed Helix Ferroelectric Liquid Crystal

Large-FoV Fast LiDAR System based on Electrically Suppressed...

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SID International Symposium Digest of Technical Papers, 2023

作者： Cheng, Yue-Chu Yuan, Zheng-Nan Sun, Zhi-Bo Srivastava, Abhishek Kumar State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

With the continuing prosperity of LiDAR markets, the demand of a fast-scanning, high-precision and inexpensive LiDAR system is growing rapidly. In this paper, we disclose a fast-switchable ferroelectric liquid crystal Dammann grating and polarization grating-based holographic projection and detection system for 3D imaging devices and LiDAR with an extended field of view. The field of view of the proposed system can achieve ~80º with © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Liquid crystals

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Ultrathin High Dichroic Ratio Azo Dye Thin Film Prepared by Photo-alignment and Its Photostability Enhancement

Ultrathin High Dichroic Ratio Azo Dye Thin Film Prepared by ...

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SID International Symposium Digest of Technical Papers, 2023

作者： Gao, Yi-Yang Tseng, Man-Chun Ho, Yeuk-Lung Cheng, Yue-Chu Vashchenko, Olena Vashchenko, Valerii Tang, Shu-Tuen Yeung, Fion Sze-Yan Kwok, Hoi-Sing State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

关键词： Azo dyes

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High-performance In-cell Polarizer with a Multi-layer Structure for Liquid Crystal displays

High-performance In-cell Polarizer with a Multi-layer Struct...

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SID International Symposium Digest of Technical Papers, 2023

作者： Cheng, Yue-Chu Gao, Yi-Yang Tseng, Man-Chun Ho, Yeuk-Lung Vashchenko, Olena Tang, Shu-Tuen Vashchenko, Valerii Sun, Zhi-Bo Yuan, Zheng-Nan Yeung, Sze-Yan Kwok, Hoi-Sing State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

This work demonstrates a high-performance in-cell polarizer adopting photo-aligned azobenzene dyes. On the strength of the multilayered design, a simple fabrication process has been developed to assemble an in-cell polarizer. We have achieved a broadband dichroic ratio after the long-term stability test. Meanwhile, the cell with the proposed in-cell polarizer can be driven regularly without a voltage boost, which renders excellent practicability in liquid crystal display technologies. The structure, fabrication process, and properties of the in-cell polarizer in TN-LCD are thoroughly discussed. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Azo dyes

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E-book with Animation Playing Capability Based on Liquid Crystal Display technology

E-book with Animation Playing Capability Based on Liquid Cry...

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SID International Symposium Digest of Technical Papers, 2023

作者： Liu, Pengcheng Tseng, Man-Chun Yeung, Fion Sze-Yan Kwok, Hoi-Sing State Key Laboratory of Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering The Hong Kong University of Science and Technology Hong Kong

Electronic ink (E-ink) displays have become increasingly popular in e-books due to their paper-like appearance, readability in direct sunlight, low power consumption, and flexible sizing. However, the slow switching speed of bistable LCDs and E-ink limits their ability to play animations. This paper proposes a novel method for fabricating fast-switching bistable liquid crystal displays capable of playing animations. The research is based on a new type of bistable LCD technology that achieves lower driving voltages than existing E-ink displays. The research team has significant experience developing bistable displays and has invented many new technologies in their laboratory. The proposed technology combines the benefits of bistable displays with the ability to play animations, a significant advancement in display technology. © 2023, John Wiley and Sons Inc. All rights reserved.

关键词： Animation

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Advances in mobility enhancement of ITZO thin-film transistors:a review

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Journal of Semiconductors 2023年第9期44卷 11-25页

作者： Feilian Chen Meng Zhang Yunhao Wan Xindi Xu Man Wong Hoi-Sing Kwok College of Electronic and Information Engineering Shenzhen UniversityShenzhen 518060China Institute of Microscale Optoelectronics(IMO) Shenzhen UniversityShenzhen 518060China State Key Laboratory of Advanced Displays and Optoelectronics Technologies The Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina

Indium-tin-zinc oxide(ITZO)thin-film transistor(TFT)technology holds promise for achieving high mobility and offers significant opportunities for *** paper provides a review of progress made in improving the mobility of ITZO *** paper begins by describing the development and current status of metal-oxide TFTs,and then goes on to explain the advantages of selecting ITZO as the TFT channel *** evaluation criteria for TFTs are subsequently introduced,and the reasons and significance of enhancing mobility are *** paper then explores the development of high-mobility ITZO TFTs from five perspectives:active layer optimization,gate dielectric optimization,electrode optimization,interface optimization,and device structure ***,a summary and outlook of the research field are presented.

关键词： thin-film transistor(TFT) indium-tin-zinc oxide(ITZO)TFT mobility active matrix(AM)displays

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Four-inch Wafer-scale and Spherical Light-emitting Diodes Based on Perovskite Quantum Wire Arrays

Four-inch Wafer-scale and Spherical Light-emitting Diodes Ba...

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International Conference on Display technology, 2024

作者： Ren, Beitao Zhang, Daquan Fan, Zhiyong Department of Electronic and Computer Engineering HKUST Kowloon Hong Kong State Key Laboratory of Advanced Displays and Optoelectronics Technologies HKUST Kowloon Hong Kong

Metal halide perovskite materials have been widely developed for next-generation light-emitting diodes (LEDs) because of their outstanding optoelectronic characteristics. However, it remains impediments to fabricate large-scale or non-planar devices by traditional solution methods. Herein, we introduce a close-spaced vapor reaction method for uniformly growing perovskite quantum wire (QW) arrays in porous alumina membrane templates on unconventional substrates in air. The as-grown MAPbBr3 QWs showcase a brilliant photoluminescence quantum yield of 92% and a photoluminescence lifetime of 5,644 hours in ambient air. Finally, four-inch wafer-scale and spherical LEDs have been successfully demonstrated, suggesting a promising fabrication approach for future large-scale display and three-dimensional lighting applications. © 2024 John Wiley and Sons Inc. All rights reserved.

关键词： Perovskite

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Advances in liquid-solid triboelectric nanogenerators and its applications

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材料科学技术（英文版） 2025年第11期214卷 153-169页

作者： Tengfei Xiang Xuxin Chen Hui Sun Di Liu Yawei Jiang Shaoqiang Chen Yannan Xie Shihong Zhang Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Anhui University of Technology) Ministry of EducationAnhui University of TechnologyMa'anshan 243002China School of Civil Engineering and Architecture Anhui University of TechnologyMa'anshan 243002China School of Civil Engineering and Architecture Anhui University of TechnologyMa'anshan 243002China School of Space Science and Physics Shandong UniversityWeihai 264209China State Key Laboratory of Organic Electronics and Information Displays & Institute of Advanced Materials(IAM) Jiangsu Key Laboratory for BiosensorsJiangsu National Synergetic Innovation Center for Advanced Materials(SICAM)Nanjing University of Posts and TelecommunicationsNanjing 210023China Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials(Anhui University of Technology) Ministry of EducationAnhui University of TechnologyMa'anshan 243002China

The significance of water energy harvesting in the context of renewable energy utilization is steadily *** response to the need for more efficient utilization of water resources,the nascent technology of liquid-solid triboelectric nanogenerators(TENGs)has emerged as a prospective candidate for the har-vesting of water ***-solid TENGs show several distinct advantages,including their lightweight,low cost,and efficient energy harvesting ***,this review presents a comprehensive expo-sition of the latest advancements in the field of liquid-solid *** delves into the underlying princi-ples and different operational modes while also addressing the factors influencing its output performance from a multifaceted *** factors comprise the intrinsic properties of friction materials,the chemical properties of the liquid,and the ambient temperature of liquid-solid ***,this review delineates the applications of liquid-solid TENGs as self-powered sensors in physics,chemistry,and biomedical contexts,as well as their applications in various other fields such as corrosion resistance,and so *** but not least,it concludes by providing a forward-looking on the future developmental trends of liquid-solid TENGs.

关键词： Triboelectric nanogenerators Liquid-solid interface Energy harvesting Self-powered

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