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Preface to Special Issue on advanced Optoelectronic and Electronic Devices toward Future displays--Celebration of the 10th anniversary of the state key laboratory of advanced displays and optoelectronics Technologies at HKUST

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Journal of Semiconductors 2023年第9期44卷 1-2页

作者： Hoi-Sing Kwok Zhiyong Fan Department of Electronic and Computer Engineering The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong SARChina State Key Laboratory of Advanced Displays and Optoelectronics Technologies HKUSTClear Water BayKowloonHong Kong SARChina

This year marks the tenth anniversary of the state key laboratory of advanced displays and optoelectronics Technologies(SKLADOT)at the Hong Kong University of Science and Technology(HKUST).The predecessor of SKLADOT w... 详细信息

关键词： ADO key UST

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Low-temperature metal–oxide thin-film transistor technologies for implementing flexible electronic circuits and systems

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Journal of Semiconductors 2023年第9期44卷 3-10页

作者： Runxiao Shi Tengteng Lei Zhihe Xia Man Wong State Key Laboratory of Advanced Displays and Optoelectronics and Technologies Department of Electronic and Computer EngineeringThe Hong Kong University of Science and TechnologyHong KongChina

Here we review two 300℃metal–oxide(MO)thin-film transistor(TFT)technologies for the implementation of flexible electronic circuits and ***-enhanced TFTs for suppressing the variation and shift of turn-on voltage(VON),and dual-gate TFTs for acquiring sensor signals and modulating VON have been deployed to improve the robustness and performance of the systems in which they are *** circuit building blocks based on fluorinated TFTs have been designed,fabricated,and characterized,which demonstrate the utility of the proposed low-temperature TFT technologies for implementing flexible electronic *** construction and characterization of an analog front-end system for the acquisition of bio-potential signals and an active-matrix sensor array for the acquisition of tactile images have been reported recently.

关键词： flexible electronics metal-oxide semiconductor thin-film transistor dual gate fluorination analog front-end system sensors

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Ferroelectric polarization and conductance filament coupling for large window and high-reliability resistive memory and energy-efficient synaptic devices

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Journal of Materials Science & Technology 2024年第31期198卷 36-43页

作者： Ming Li Zhengmiao Zou Zihao Xu Junfeng Zheng Yushan Li Ruiqiang Tao Zhen Fan Guofu Zhou Xubing Lu Junming Liu Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Institute of Electronic Paper Displays and Guangdong Provincial Key Laboratory of Optical Information Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 21009China

Ferroelectric capacitors hold great promise for non-volatile memory ***,the challenge lies in fabricating resistive switching devices with a high on/off ratio,excellent non-volatility,and a simple manufacturing ***,a novel approach is introduced by demonstrating the efficacy of the coupling effect between ferroelectric polarization and oxygen vacancy-based conductive filaments in Hf_(0.5)Zr_(0.5)O_(2)(HZO)films for the creation of non-volatile resistive switching memory devices,achieving an impressive on/off ratio of 6.8×10^(3) at+1.8 *** in-depth exploration of the resistive switching mechanism is provided and subsequently the outstanding durability and retention characteristics of these devices for resistive switching is ***,the device's capacity to emulate non-volatile synaptic functionalities is *** results reveal that under pulsed conditions of 1 V/-2 V with 1µs pulses spaced 50 ms apart,the device can robustly achieve potentiation/depression synaptic plasticity,while exhibiting energy consumption(0.16 fJ for potentiation,0.12 fJ for depression)reduced by 1-2 orders of magnitude compared to biological *** work holds significant value as a reference for the fabrication of energy-efficient,non-volatile memory and synaptic devices.

关键词： Ferroelectric Conductance filament Resistive memory Energy-efficient Synaptic devices

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Multicolor emission from lanthanide ions doped lead-free Cs_(3)Sb_(2)Cl_(9) perovskite nanocrystals

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Journal of Rare Earths 2024年第5期42卷 940-946,I0005页

作者： He Shao Lifang Li Xiufeng Wu Lin Xu Biao Dong Donglei Zhou Xue Bai Hongwei Song State Key Laboratory of Organic Electronics and Information Displays&Institute of Advanced Materials College of Materials Science and EngineeringNanjing University of Posts&TelecommunicationsNanjing210023China State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering Jilin UniversityChangchun130012China

The toxicity of lead ions has become the severe challenge for the all-inorganic lead halide p erovskite materials,although some works have rep orted the lead-free perovskite nanocrystals(NCs),the photoluminescence quantum yield(PLQY)of these materials is still ***,because the halogen ions can be easily exchanged,the controllable multicolor emission in perovskite NCs is difficult to realize in current *** this work,we introduced lanthanide ions into lead-free Cs_(3)Sb_(2)Cl_(9) perovskite *** from the energy transfer between Cs_(3)Sb_(2)Cl_(9) perovskite NC host and lanthanide ions,the multicolor emission was *** on controlling the doping concentration of Tb^(3+)and Eu^(3+)ions,the white light emission under UV excitation would be turned easily in the Tb^(3+)/Eu^(3+)codoped *** addition,efficient energy transfer from perovskite NCs to Tb^(3+)or Eu^(3+)ions is beneficial to improving the optical properties of lead-free perovskite NCs,resulting in maximum PLQYs of red,green and white light emission of 22.6%,19.7%and 28.5%,***,a white light emitting device(WLED)was fabricated with a power efficiency of 18.5 lm/W,which presents the Commission Internationale de l'Eclairage(CIE)of(0.33,0.35).

关键词： Perovskite nanocrystals Lead free Lanthanide ions Energy transfer White light emitting device Rare earths

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Quantum Rods based Truly Random Number Generator (QR-TRNG)

Quantum Rods based Truly Random Number Generator (QR-TRNG)

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International Symposium, Seminar, and Exhibition, Display Week 2024

作者： Mnaidar, Bibarys Swaminathan, Vigneshwaran Bhadra, Debjyoti Song, Jianxin Prodanov, Maksym Srivastava, Abhishek Kumar State Key Laboratory of Advanced Displays and Optoelectronics Technologies China Centre for Display Research China IAS Center for Quantum Technologies China

The novel technology is proposed as a quantum rod-based truly random number generator. The objective is to construct a device array by stacking together 5 layers: 1) backlight-unit;2) thinfilm transistor liquid crystal display;3) quarter waveplate;4) & 5) quantum rod films, red and green, respectively, aligned uniformly in-plane yet orthogonally to each other. QR's anisotropic absorption nature plays a key role in generating 4 different pixel outputs: 0 - pixel is off;1 - excited pixel is predominantly green;2 - yellowish;3 - red. Further, TRNG is enabled by rotating excitation polarization-direction. © 2024, John Wiley and Sons Inc. All rights reserved.

关键词： Liquid crystal displays

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Relative Localization for Real-time Adaptive Quadruped Mobile Projector System

Relative Localization for Real-time Adaptive Quadruped Mobil...

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International Conference on Display Technology, 2024

作者： Gao, Qiangsheng Cheng, Ka Ho Li, Anran Liu, Yibo The Hong Kong University of Science and Technology Hong Kong State Key Laboratory of Advanced Displays and Optoelectronics Technologies and Centre for Display China

The technology of home projectors has matured significantly. However, most projectors are limited to static manual projectors, and projectors capable of automatic focusing and keystone correction are expensive. Furthermore, there is still room for development in the adaptability and real-time performance of the screen distance and spatial angle measurement systems that projectors use for automatic focusing and keystone correction. Compared with the existing laser focusing technology, in this research, we present an alternative solution to acquire real-time screen distance and spatial angle estimations using relative localization algorithms and an ultrasonic ranging sensor array. The relative localization information can then be employed for automatic focusing and keystone correction of a projector mounted on the mobile platform of an open-source quadruped robot. The proposed approach will enhance the versatility and adaptability of the projector system, providing an economical solution for realtime automatic focusing and keystone correction in mobile projector platforms. © 2024 John Wiley and Sons Inc. All rights reserved.

关键词： Real time systems

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Advancements in Photoaligned Azo-Dye Thin-Film Polarizer with Exceptional Dichroic Ratio

Advancements in Photoaligned Azo-Dye Thin-Film Polarizer wit...

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International Symposium, Seminar, and Exhibition, Display Week 2024

作者： Cheng, Yue-Chu Tseng, Man-Chun Ho, Yeuk-Lung Vashchenko, Olena Vashchenko, Valerii Tang, Shu-Tuen 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 study presents the development of ultra-thin azo-dyepolarizers, notable for their minimal thickness (100-200 nm) and superior optical performance, with polarization efficiency exceeding 99.9%, extinction ratios above 4000, transmittance over45.3%, and dichoric ratio over 100. Utilizing cost-effective solution-processing methods, we fabricate these high-performance polarizers and determine optimal experimental conditions for peak efficacy. Our research includes comprehensive Scanning Electron Microscopy analyses to understand the microstructural properties of these azo-dye thin film polarizers, contributing significantly to the field of advanced display technologies. © 2024, John Wiley and Sons Inc. All rights reserved.

关键词： Liquid crystal displays

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Characterization and Performance Evaluation of Photo-Aligned Azo-Dye Thin-Film Polarizers

Characterization and Performance Evaluation of Photo-Aligned...

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International Conference on Display Technology, 2024

This study presents the characterization and performance evaluation of photo-aligned azo-dye thin-film polarizers, highlighting their ultra-thin profiles and superior optical functionalities. Utilizing cost-effective solution-processing methods, these high-efficiency polarizers were developed, with the research pinpointing optimal experimental conditions for peak performance. © 2024 John Wiley and Sons Inc. All rights reserved.

关键词： Azo dyes

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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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Multi-domain Vertically Aligned LCD by Azo-Dye Photo-alignment Method

Multi-domain Vertically Aligned LCD by Azo-Dye Photo-alignme...

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International Conference on Display Technology, 2024

作者： Tang, Shu Tuen Chiu, Hon Wah Tseng, Man Chun Kwok, Hoi Sing State Key Laboratory on Advanced Displays and Optoelectronics Technologies Department of Electronic and Computer Engineering Hong Kong University of Science and Technology Kowloon Hong Kong

Vertically Aligned LCD is one of the most widely used optical modes in LCD TV and mobile devices. It is also a very important category of passive LC displays used in Automobiles. It has the advantages of perfect dark state and very high contrast ratio for normal viewing. However, single domain VA LCD has the intrinsic issue of dead zone (contrast vanishing zone) in certain viewing direction in the voltage-on state, which seriously limits its viewing angle performance. Recently, the state key laboratory on advanced displays and optoelectronics Technologies of the Hong Kong University of Science and Technology has developed an easy-to-apply multi-domain VA LCD technology that can be readily implemented in LCD factories without major investment and change in current production process. © 2024 John Wiley and Sons Inc. All rights reserved.

关键词： Azo dyes

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