Self-polarized RGB device realized by semipolar micro-LEDs and perovskite-in-polymer films for backlight applications  

作　　者：Tingwei Lu Yue Lin Tianqi Zhang Yue Huang Xiaotong Fan Shouqiang Lai Yijun Lu Hao-Chung Kuo Zhong Chen Tingzhu Wu Rong Zhang 

机构地区：[1]School of Electronic Science and Engineering,Fujian Engineering Research Center for Solid-State Lighting,Xiamen University,Xiamen 361005,China [2]Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province(IKKEM),Xiamen 361005,China [3]Department of Photonics and Graduate Institute of Electro-Optical Engineering,College of Electrical and Computer Engineering,Yang Ming Chiao Tung University,Hsinchu 30010,China [4]Semiconductor Research Center,Hon Hai Research Institute,Taipei 11492,China.

出　　处：《Opto-Electronic Advances》2024年第3期35-49,共15页光电进展（英文）

基　　金：the National Natural Science Foundation of China(62274138);Natural Science Foundation of Fujian Province of China(2023J06012);Science and Technology Plan Project in Fujian Province of China(2021H0011);Fundamental Research Funds for the Central Universities(20720230029);Compound semiconductor technology Collaborative Innovation Platform project of FuXiaQuan National Independent Innovation Demonstration Zone(3502ZCQXT2022005).

摘　　要：In backlighting systems for liquid crystal displays,conventional red,green,and blue(RGB)light sources that lack polarization properties can result in a significant optical loss of up to 50%when passing through a polarizer.To address this inefficiency and optimize energy utilization,this study presents a high-performance device designed for RGB polarized emissions.The device employs an array of semipolar blueμLEDs with inherent polarization capabilities,coupled with mechanically stretched films of green-emitting CsPbBr3 nanorods and red-emitting CsPbI3-Cs4PbI6 hybrid nanocrystals.The CsPbBr3 nanorods in the polymer film offer intrinsic polarization emission,while the aligned-wire structures formed by the stable CsPbI3-Cs4PbI6 hybrid nanocrystals contribute to substantial anisotropic emissions,due to their high dielectric constant.The resulting device achieved RGB polarization degrees of 0.26,0.48,and 0.38,respectively,and exhibited a broad color gamut,reaching 137.2%of the NTSC standard and 102.5%of the Rec.2020 standard.When compared to a device utilizing c-plane LEDs for excitation,the current approach increased the intensity of light transmitted through the polarizer by 73.6%.This novel fabrication approach for polarized devices containing RGB components holds considerable promise for advancing next-generation display technologies.

关 键 词：halide perovskite LIGHT-EMITTING-DIODES polarized emission nanocrystals stability 

分 类 号：TN873.93[电子电信—信息与通信工程]