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Aggregate 2024年第5期5卷 385-393页

作者： Zhen Zhang Rongrong Xia Ke Wang Youjun Wu Panpan Zang Xuemin Gan Zhangcheng Liao Bin Wei Peng Wu Stefan Bräse Zixing Wang Key Laboratory of Advanced Display and System Applications Ministry of EducationShanghai UniversityShanghaiChina Institute of Organic Chemistry Karlsruhe Institute of Technology(KIT)KarlsruheGermany Institute of Biological and Chemical Systems-Functional Molecular Systems(IBCS-FMS) Karlsruhe Institute of Technology(KIT)KarlsruheGermany

Thermally activated delayedﬂuorescence(TADF)molecules are regarded as promis-ing materials for realizing high-performance organic light-emitting diodes(OLEDs).The connecting groups between donor(D)and acceptor(A)units in D–A type TADF molecules could affect the charge transfer and luminescence performance of TADF materials in aggregated *** this work,we design and synthesize four TADF molecules using planar and twisted linkers to connect the aza-azulene donor(D)and triazine acceptor(A).Compared with planar linkers,the twisted ones(Az-NP-T and Az-NN-T)can enhance A–A aggregation interaction between adjacent molecules to balance hole and electron *** a result,highly efﬁcient and stable deep-red top-emission OLEDs with a high electroluminescence efﬁciency of 57.3%and an impressive long operational lifetime(LT_(95)∼30,000 h,initial luminance of 1000 cd m^(-2))are *** study provides a new strategy for designing more efﬁ-cient and stable electroluminescent devices through linker aggregation engineering in donor–acceptor molecules.

关键词： acceptor stacking balanced carrier transfer host materials long device lifetime thermally activated delayedﬂuorescence

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Efficient Red Sn-Based Perovskite Light Emitting Diodes by a Competitive Antioxidation Strategy

IEEE Electron Device Letters

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IEEE Electron Device Letters 2025年第6期46卷 948-951页

作者： Gong, Yingqun Shi, Yuxin Huo, Sitao Wang, Lin Zhang, Xiaofei Kong, Lingmei Wang, Sheng Yang, Yingguo Yang, Xuyong Shanghai University Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai200072 China Seoul National University Department of Materials Science and Engineering Seoul08826 Korea Republic of Shanghai Tianma Micro-Electronics Company Ltd. Shanghai110044 China Zhangjiang Laboratory Shanghai200031 China Fudan University School of Microelectronics Shanghai200433 China

Tin (Sn)-based perovskite light-emitting diodes (PeLEDs) have emerged as a promising candidate for next-generation displays because of their eco-friendliness, exceptional optoelectronic properties, and cost-effective solution processability. However, their electroluminescence performance still lags behind their lead (Pb) counterparts, primarily due to the undesired Sn2+ oxidation to Sn4+ and the rapid crystallization of Sn-based perovskite, resulting in high defect density as well as poor film quality. Herein, we reported a competitive antioxidation strategy by utilizing a phosphorus ylide, namely (triphenylphosphoranilidene) acetaldehyde (TPPA), to suppress the oxidation of Sn2+ and regulate the growth kinetics, simultaneously. The TPPA with highly active polar phosphorus-carbon bonds can be oxidized prior to Sn2+, and their large steric hindrance can slow down the crystallization process of tin-based perovskite. Moreover, the main product from the oxidation reaction, namely triphenylphosphine oxide (TPPO), can further passivate defects by coordinating with SnI6 octahedra. The resulting Sn-based perovskite film exhibits enhanced optical properties and uniform, dense morphology. Leveraging these improvements, the optimized PeLED delivers pure-red light emission with Commission Internationale de L’Eclairage (CIE) color coordinates of (0.69, 0.30), an external quantum efficiency (EQE) of 8.1% and maximum luminance of 672 cd m−2. This work provides a facile route to enhance the overall performance of Sn-based PeLEDs. © 1980-2012 IEEE.

关键词： Perovskite

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Color liquid crystal grating based color holographic 3D display system with large viewing angle

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Light(Science & applications) 2024年第1期13卷 103-112页

作者： Di Wang Yi-Long Li Fan Chu Nan-Nan Li Zhao-Song Li Sin-Doo Lee Zhong-Quan Nie Chao Liu Qiong-Hua Wang School of Instrumentation and Optoelectronic Engineering Beihang UniversityBeijing 100191China State Key Laboratory of Virtual Reality Technology and Systems Beihang UniversityBeijing 100191China Display Technology Research Center Seoul National UniversityGwanak-ro 1Gwanak-guSeoul 08826Republic of Korea Key Lab of Advanced Transducers and Intelligent Control System Ministry of EducationTaiyuan University of TechnologyTaiyuan 030024China

Holographic 3D display is highly desirable for numerous applications ranging from medical treatments to military ***,it is challenging to simultaneously achieve large viewing angle and high-fidelity color reconstruction due to the intractable constraints of existing ***,we conceptually propose and experimentally demonstrate a simple and feasible pathway of using a well-designed color liquid crystal grating to overcome the inevitable chromatic aberration and enlarge the holographic viewing angle,thus enabling large-viewing-angle and color holographic 3D *** use of color liquid crystal grating allows performing secondary diffraction modulation on red,green and blue reproduced images simultaneously and extending the viewing angle in the holographic 3D display *** principle,a chromatic aberration-free hologram generation mechanism in combination with the color liquid crystal grating is proposed to pave the way for on such a superior holographic 3D *** proposed system shows a color viewing angle of~50.12°,which is about 7 times that of the traditional system with a single spatial light *** work presents a paradigm for achieving desirable holographic 3D display,and is expected to provide a new way for the wide application of holographic display.

关键词： holographic angle crystal

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Advancements in graphene-based composites: A review of the emerging applications in healthcare

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Smart Materials in Medicine 2025年第1期6卷 120-138页

作者： Batool, Farwa Muhammad, Saz Muazzam, Rabia Waqas, Muhammad Ullah, Zia Roy, Shubham Zhang, Yinghe Wang, Ke Guo, Bing Department of Chemistry Lahore Garrison University DHA Phase VI Lahore Pakistan School of System Design and Intelligent Manufacturing Southern University of Science and Technology Shenzhen518055 China School of Science Shenzhen Key Laboratory of Flexible Printed Electronics Technology Shenzhen Key Laboratory of Advanced Functional Carbon Materials Research and Comprehensive Application Harbin Institute of Technology Shenzhen518055 China Government Queen Mary Graduate College Lahore Pakistan

Graphene and related materials are emerging revolutionary materials due to fascinating stimuli-responsive physiochemical properties having widespread applications in developing advanced nano-systems for detection, diagnostics, and therapeutics in biomedical fields. Various materials like metal nanoparticles, polymers, dyes, drugs, and proteins could be combined yielding graphene-based composite materials (GBCMs) to synergistically fulfill different biomedical requirements. The 2D conjugated structure, easy surface functionalization via covalent or van der Waal interactions, and combination with different components for versatile functionalities altogether contribute to the development of GBCM for healthcare applications. This review specifically focuses on GBCMs and discusses specific material properties relevant to their material applications in healthcare. Furthermore, the synthesis, toxicity, and biocompatibility of these GBCMs, and their interactions with biological materials are thoroughly discussed. Importantly, the recent cutting-edge applications in the field of healthcare, including its role in the development of antibacterial, anti-viral, and photothermal therapies, wound healing, drug delivery, neurodegenerative disease therapy, and biosensing based on GBCMs are well-updated. Additionally, the applications of GBCMs in point-of-care devices, wearable electronics, and tissue engineering are well summarized. We hope this review opens up more possibilities to design more innovative healthcare materials derived from graphene. © 2025 The Authors

关键词： Biocompatibility

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Multi-depth Hologram Generation with Unsupervised-learning Based Computer-generated Holography

Multi-depth Hologram Generation with Unsupervised-learning B...

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Digital Holography and Three-Dimensional Imaging, DH 2022

作者： Shui, Xinghua Zheng, Huadong Department of Precision Mechanical Engineering Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai200072 China

Unsupervised-learning based computer-generated holography provides an approach for 2D hologram generation. We propose an unsupervised learning network for multi-depth hologram generation with fully utilizing the diffe... 详细信息

ISBN: (纸本)9781957171128

关键词： Holograms

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Nonorthogonal code division multiplexing holography

Nonorthogonal code division multiplexing holography

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2024 Conference on Spectral technology and applications, CSTA 2024

作者： Xu, Tingting Li, Xin Zheng, Longhao Wang, Kexin Huang, Lingling Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and Photonics Beijing Institute of Technology Beijing100081 China MOE Key Laboratory of Photoelectronic Imaging Technology and System MIIT Key Laboratory of Photonics Information Technology School of Optics and Photonics Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510683082

Computer-generated holography (CGH) is one of promising technologies in wavefront engineering, and multiplexing holography brings more information channels. Inspired by code division multiplexing (CDM) in communications, CDM holography demonstrate its feasibility to recording independent images with high-density in a single hologram. Here, we design CDM holograms with nonorthogonal coded beams as illumination light to record the optical information of both binary and gray-level target images. The results exhibit that optimization in CDM holography ensures a low-level cross talk between each channel. Also, it is difficult for eavesdroppers to decode any information of coded illuminations. Such a large number of information channels and its outstanding features can offer high security for optical data. © 2024 SPIE.

关键词： Holograms

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Single-Celled Metasurface Full-Color Holography by Independent Phase Control at RGB Wavelengths

Single-Celled Metasurface Full-Color Holography by Independe...

引用

2024 Conference on Spectral technology and applications, CSTA 2024

作者： Zhang, Xiaotong Li, Xin Huang, Lingling Wang, Yongtian Beijing Engineering Research Center of Mixed Reality and Advanced Display School of Optics and Photonics Beijing Institute of Technology Beijing100081 China MOE Key Laboratory of Photoelectronic Imaging Technology and System MIIT Key Laboratory of Photonics Information Technology School of Optics and Photonics Beijing Institute of Technology Beijing100081 China

ISBN: (纸本)9781510683082

Color holographic display is one of the most promising future display technologies. Introducing metasurfaces to holographic display brings more possibilities. Spatially multiplexing multicolor holography is a common way and it has lower resolution and irreducible noise. In order to realize full color metasurface holography, we elaborately design a metasurface in which each unit structure can independently manipulate the phase at three wavelengths of red, green and blue (RGB). The computer-generated holograms (CGH) of RGB components are obtained firstly, and the phase modulation of G-CGH is based on geometric phase, and the phase difference between R-G CGH and B-G CGH are based on the propagation phase, hence a full-color hologram can be reconstruct without relying on spatial multiplexing. Our work would have important implications for color holographic projection, near-eye displays, and multi-wavelength control. © 2024 SPIE.

关键词： Holograms

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Anti-Blue Light and Hydrophobic Composite Film Based on Iron Oxide and Fas-Modified Sio2

SSRN

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SSRN 2024年

作者： Zhang, Jianhua Yu, Jiaqi Wu, Xingyang Qiao, Weidong Wang, Hongdong Key Laboratory of Advanced Display and System Application Ministry of Education Shanghai University Shanghai200444 China School of Mechatronic Engineering and Automation Shanghai University Shanghai200444 China

With the wide application of display and lighting devices, the potential injury to human eyes due to the blue light has been attracting significant attention. While current anti-blue light films are complex, costly and low stability in humid environments. In this work, anti-blue light films were fabricated using iron oxide as blue light absorbent and polyvinylpyrrolidone as surfactant, under different Fe3+ concentrations and annealing temperatures. The films exhibited average 60% absorption of blue light in 400-450 nm wavelength range and maintained 96% transmittance within 500-800 nm. Moreover, to improve the hydrophobicity, 1H,1H,2H,2H-perfluorodecyltriethoxysilane (FAS)-modified SiO2 (FASS) hydrophobic layer was deposited onto the iron oxide films to obtain the composite iron oxide/FASS films. The composite films remained transmittance almost unchanged after 15 days at 85 °C and 85% relative humidity. Also, cell experiments proved that the composite films could protect human retinal pigment epithelium cells from blue light injury. Moreover, the color rendering index of the display screen remained almost unchanged after covered with the composite film, while the blue light-weighted radiance was reduced significantly. © 2024, The Authors. All rights reserved.

关键词： Iron oxides

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High Performance All Oxide Thin Film Transistor With Ink-Jet Printing Metal Oxide Dielectric Pattern

SSRN

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SSRN 2024年

作者： Zhao, Zexian Gui, Zhenghao Xu, Meng Zou, Kefeng Chen, Longlong Li, Xifeng Zhang, Jianhua School of Materials Science and Engineering Shanghai University Shanghai200444 China Key Laboratory of Advanced Display and System Application of Ministry of Education Shanghai University Shanghai200072 China

In this paper, the effect of the printing parameters on the forming behavior of dot, line and plane for hafnium aluminum oxide (HAO) is thorough investigated by simulation and experiment. At first, the spreading process of inkjet droplets has been numerically simulated through the utilization of the volume of fluid (VOF) model. And the optimal contact angle and drop space for printing HAO pattern were obtained. Ultrasonic treatment can remove some polar hydrophilic molecules on the surface of the substrate, which controlled the spread of the printed patterns. The inkjet-print HAO film exhibits the permittivity of 9.3 at 100kHz and afforded a leakage current below 10-6 A/cm2 at 2 MV. Finally, the fabricated TFTs using inkjet print exhibit mobility (μ) of 8.89 cm2v-1s-1, subthreshold swing (SS) of 0.09 V/decade and ON-OFF-current ratio (Ion/Ioff) of 8.69×108. Implied that the ultrasonic treatment can serve as guidelines for high quality printing pattern. © 2024, The Authors. All rights reserved.

关键词： Morphology

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Efficient and stable hybrid perovskite-organic light-emitting diodes with external quantum efficiency exceeding 40 per cent

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Light(Science & applications) 2024年第7期13卷 1364-1371页

作者： Lingmei Kong Yun Luo Qianqian Wu Xiangtian Xiao Yuanzhi Wang Guo Chen Jianhua Zhang Kai Wang Wallace CHChoy Yong-Biao Zhao Hongbo Li Takayuki Chiba Junji Kido Xuyong Yang Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai UniversityShanghai 200072China. Institute of Nanoscience and Applications Department of Electrical and Electronic EngineeringSouthern University of Science and TechnologyShenzhen 518055China. Department of Electrical and Electronic Engineering The University of Hong KongHong KongChina. Department of Physics and Lakeside AR/VR Laboratory International Joint Research Center for Optoelectronic and Engineering ResearchYunnan UniversityKunming 650091China. Experimental Center of Advanced Materials School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China. Graduate School of Organic Materials Science Frontier Center for Organic MaterialsYamagata University4-3-16 JonanYonezawa 992–8510Japan

Light-emitting diodes(LEDs)based on perovskite semiconductor materials with tunable emission wavelength in visible light range as well as narrow linewidth are potential competitors among current light-emitting display technologies,but still suffer from severe instability driven by electric ***,we develop a stable,efficient and highcolor purity hybrid LED with a tandem structure by combining the perovskite LED and the commercial organic LED technologies to accelerate the practical application of *** LED and organic LED with close photoluminescence peak are selected to maximize photon emission without photon reabsorption and to achieve the narrowed emission *** designing an efficient interconnecting layer with p-type interface doping that provides good opto-electric coupling and reduces Joule heating,the resulting green emitting hybrid LED shows a narrow linewidth of around 30 nm,a peak luminance of over 176,000 cd m^(−2),a maximum external quantum efficiency of over 40%,and an operational half-lifetime of over 42,000 h.

关键词： diodes narrow quantum

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