• Photonics Research
  • Vol. 9, Issue 12, 12002341 (2021)
Konthoujam James Singh1、2, Xiaotong Fan3, Annada Sankar Sadhu1、2, Chun-Ho Lin4, Fang-Jyun Liou1, Tingzhu Wu3、7、*, Yu-Jung Lu5, Jr-Hau He6, Zhong Chen3, Tom Wu4, and Hao-Chung Kuo1、8、*
Author Affiliations
  • 1Department of Photonics & Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, Taiwan Yang Ming Chiao Tung University, Hsinchu 30010, China
  • 2International Ph.D. Program in Photonics (UST), College of Electrical and Computer Engineering, Taiwan Yang Ming Chiao Tung University, Hsinchu 30010, China
  • 3Department of Electronic Science, Fujian Engineering Research Center for Solid-State Lighting, Xiamen University, Xiamen 361005, China
  • 4School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052, Australia
  • 5Research Center for Applied Sciences, Academia Sinica, Taipei 11529, China
  • 6Department of Materials Science and Engineering, City University of Hong Kong, Kowloon Tong, Hong Kong, China
  • 7e-mail: wutingzhu@xmu.edu.cn
  • 8e-mail: hckuo@faculty.nctu.edu.tw
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    Abstract

    We propose a flexible white-light system for high-speed visible-light communication (VLC) applications, which consists of a semipolar blue InGaN/GaN single-quantum-well micro-light-emitting diode (LED) on a flexible substrate pumping green CsPbBr3 perovskite quantum-dot (PQD) paper in nanostructure form and red CdSe QD paper. The highest bandwidth for CsPbBr3 PQD paper, 229 MHz, is achieved with a blue micro-LED pumping source and a high data transmission rate of 400 Mbps; this is very promising for VLC application. An 817 MHz maximum bandwidth and a 1.5 Gbps transmission speed are attained by the proposed semipolar blue micro-LEDs. The proposed flexible white light system and the high-bandwidth PQD paper could pave the way for VLC wearable devices.

    1. INTRODUCTION

    Through technological advances, light-emitting diode (LED)-based systems have been commercialized and are now widely used in applications such as large displays, traffic lights, indoor and street lighting, automobiles, cell phones, and liquid-crystal displays [13]. Recently, white-light-emitting materials have attracted considerable attention owing to their potential use in LEDs, lighting, communications, and, especially, flexible display devices. White-light systems based on micro-LEDs and color converters such as quantum dots (QDs) are becoming more prominent in visible-light communication (VLC) applications. Furthermore, organic optoelectronic components are now being used in VLC systems because they are cheaper and more environmentally friendly, portable, and flexible than traditional silicon-based devices; moreover, they can be mass-produced [49]. Application of organic optoelectronic components to VLC systems will allow such systems to be incorporated into wearable fabrics and industrial products.