Identifying the role of carrier overflow and injection current efficiency in a GaN-based micro-LED efficiency droop model

Liu, Yibo1; Zhanghu, Mengyuan2; Feng, Feng1; Li, Zichun1; Zhang, Ke3; Kwok, Hoi Sing1; Liu, Zhaojun2,3

2023-05-22

10.1364/OE.487475Journal

OPTICS EXPRESS   影响因子和分区

1094-4087

In this paper, we investigate the efficiency droop phenomenon in green and blue GaN-based micro-LEDs of various sizes. We discuss the distinct carrier overflow performance in green and blue devices by examining the doping profile extracted from capacitance-voltage characterization. By combining the size-dependent external quantum efficiency with the ABC model, we demonstrate the injection current efficiency droop. Furthermore, we observe that the efficiency droop is induced by injection current efficiency droop, with green micro-LEDs exhibiting a more pronounced droop due to more severe carrier overflow compared to blue micro-LEDs. & COPY; 2023 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

SCI ; EI

英语

通讯

Shenzhen Science and Technology["JSGG20180507183058189","JSGG20180508152033073"] ; Shenzhen Peacock Team funding[KQTD20170810110313773] ; Science and Technology Planning Project of Guangdong Province[2017B010114002]

Optics

Optics

WOS:001012059600007

Optica Publishing Group

20232614291456

Capacitance ; Efficiency ; Gallium nitride ; III-V semiconductors

Electricity: Basic Concepts and Phenomena:701.1 ; Semiconducting Materials:712.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Production Engineering:913.1

PHYSICS

Web of Science

1.Hong Kong Univ Sci & Technol, Dept Elect & Comp Engn, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Dept Elect & Elect Engn, Shenzhen, Peoples R China
3.Shenzhen Sitan Technol Co Ltd, Shenzhen, Peoples R China

Liu, Yibo,Zhanghu, Mengyuan,Feng, Feng,et al. Identifying the role of carrier overflow and injection current efficiency in a GaN-based micro-LED efficiency droop model[J]. OPTICS EXPRESS,2023,31(11):17557-17568.

Liu, Yibo.,Zhanghu, Mengyuan.,Feng, Feng.,Li, Zichun.,Zhang, Ke.,...&Liu, Zhaojun.(2023).Identifying the role of carrier overflow and injection current efficiency in a GaN-based micro-LED efficiency droop model.OPTICS EXPRESS,31(11),17557-17568.

Liu, Yibo,et al."Identifying the role of carrier overflow and injection current efficiency in a GaN-based micro-LED efficiency droop model".OPTICS EXPRESS 31.11(2023):17557-17568.