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Chin. Phys. B, 2017, Vol. 26(10): 108504    DOI: 10.1088/1674-1056/26/10/108504
INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY Prev   Next  

Micro-light-emitting-diode array with dual functions of visible light communication and illumination

Yong Huang(黄涌)1,2,3, Zhi-You Guo(郭志友)1,2,3, Hui-Qing Sun(孙慧卿)1,2,3, Hong-Yong Huang(黄鸿勇)1,2,3
1. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, Guangzhou 510631, China;
2. Institute of the Opto-Electronic Materials and Technology, South China Normal University, Guangzhou 510631, China;
3. Guangdong Engineering Technology Research Center of Optoelectronic Functional Materials and Devices, Guangzhou 510631, China
Abstract  We demonstrate high-speed blue 4×4 micro-light-emitting-diode (LED) arrays with 14 light-emitting units (two light-emitting units are used as the positive and negative electrodes for power supply, respectively) comprising multiple quantum wells formed of GaN epitaxial layers grown on a sapphire substrate, and experimentally test their applicability for being used as VLC transmitters and illuminations. The micro-LED arrays provide a maximum -3-dB frequency response of 60.5 MHz with a smooth frequency curve from 1 MHz to 500 MHz for an optical output power of 165 mW at an injection current of 30 mA, which, to our knowledge, is the highest response frequency ever reported for blue GaN-based LEDs operating at that level of optical output power. The relationship between the frequency and size of the device single pixel diameter reveals the relationship between the response frequency and diffusion capacitance of the device.
Keywords:  light-emitting devices      optical communications      diffusion capacitance  
Received:  03 April 2017      Revised:  09 July 2017      Accepted manuscript online: 
PACS:  85.60.Jb (Light-emitting devices)  
  42.79.Sz (Optical communication systems, multiplexers, and demultiplexers?)  
  84.37.+q (Measurements in electric variables (including voltage, current, resistance, capacitance, inductance, impedance, and admittance, etc.))  
Fund: Project supported by the Science and Technology Program Project for the Innovation of Forefront and Key Technology of Guangdong Province, China (Grant Nos. 2014B010119004, 2014B010121001, and 2013B010204065), the Institute of Science and Technology Collaborative Innovation Major Project of Guangzhou City, Guangdong Province, China (Grant No. 201604010047), the Special Project for Key Science and Technology of Zhongshan City, Guangdong Province, China (Grant No. 2014A2FC204), and the Fund from the Huadu Science and Technology Bureau of Guangdong Province, China (Grant No. HD15PT003).
Corresponding Authors:  Zhi-You Guo     E-mail:  guozy@scnu.edu.cn

Cite this article: 

Yong Huang(黄涌), Zhi-You Guo(郭志友), Hui-Qing Sun(孙慧卿), Hong-Yong Huang(黄鸿勇) Micro-light-emitting-diode array with dual functions of visible light communication and illumination 2017 Chin. Phys. B 26 108504

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