Highly stable full-color display device with VLC application potential using semipolarμLEDs and all-inorganic encapsulated perovskite nanocrystal  

作　　者：TINGZHU WU YUE LIN YU-MING HUANG MENG LIU KONTHOUJAM JAMES SINGH WANSHENG LIN TINGWEI LU XI ZHENG JIANYANG ZHOU HAO-CHUNG KUO ZHONG CHEN 

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]Fujian Science&Technology Innovation Laboratory for Energy Materials of China,Xiamen 361005,China [3]Department of Photonics and Graduate Institute of Electro-Optical Engineering,College of Electrical and Computer Engineering,Taiwan Chiao Tung University,Hsinchu 30010,China [4]Semiconductor Research Center,Hon Hai Research Institute,Taipei 11492,China

出　　处：《Photonics Research》2021年第11期2132-2143,共12页光子学研究（英文版）

基　　金：National Natural Science Foundation of China(11904302,61504112);Major Project of the Science and Technology in Fujian Province of China(2019HZ020013);Industry University Cooperation Project of Science and Technology Department in Fujian Province of China(2018H6022);Major Science and Technology Projects in Xiamen of China(3502Z20191015);Fundamental Research Funds for the Central Universities(20720190005)。

摘　　要：A promising approach for the development of effective full-color displays is to combine blue micro LEDs(μLEDs)with color conversion layers.Perovskite nanocrystals(PNCs)are notable for their tolerance to defects and provide excellent photoluminescence quantum yields and high color purity compared to metal chalcogenide quantum dots.The stability of PNCs in ambient conditions and under exposure to blue light can be improved using a SiO;coating.This study proposes a device that could be used for both display and visible light communication(VLC)applications.The semipolar blueμLED array fabricated in this study shows a negligible wavelength shift,indicating a significant reduction in the quantum confined Stark effect.Owing to its shorter carrier lifetime,the semipolar μLED array exhibits an impressive peak 3 dB bandwidth of 655 MHz and a data transmission rate of1.2 Gb/s corresponding to an injection current of 200 m A.The PNC-μLED device assembled from a semipolarμLED array with PNCs demonstrates high color stability and wide color-gamut features,achieving 127.23% and 95.00%of the National Television Standards Committee standard and Rec.2020 on the CIE 1931 color diagram,respectively.These results suggest that the proposed PNC-μLED device is suitable for both display-related and VLC applications.

关 键 词：VLC quantum polar 

分 类 号：TN873.93[电子电信—信息与通信工程]