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Numerical investigation on temperature-dependence of luminous properties of blue/violet LEDs

ZHANG LINGKUN1, WANG DANGHUI1,* , CHE YUANG1, ZHANG MENGFAN1, YUAN TIANHAO1

Affiliation

  1. College of New Energy of Xi’an Shiyou University, Xi’an 710065, China

Abstract

In recent years, the short-wavelength blue/ultraviolet LED has attracted great attention in the fields of pathogen killing, full-color display, near-field communication, high-density optical storage and so on. In this study, the relationships between bandgap, luminescence properties, electrical properties and temperature of III-nitride multiple quantum wells violet LED and blue LED are investigated using APSYS software. The conclusions indicate that the bandgap, spontaneous emission spectrum, optical output power, internal quantum efficiency and ideality factor are strongly temperature-dependent in the studied temperature range. Further, temperature has a greater impact on the luminescence properties and electrical properties of blue LEDs than those of violet LEDs. This paper elucidates the effect of temperature on the luminous efficiency of III-nitride blue/violet LEDs at the examined temperatures, which provides theoretical support for further improving and optimizing the quantum efficiency and luminous properties of blue/violet LEDs..

Keywords

Blue/violet light-emitting diode, Temperature-dependence, Quantum efficiency, Electrical properties.

Submitted at: Jan. 11, 2024
Accepted at: July 30, 2024

Citation

ZHANG LINGKUN, WANG DANGHUI, CHE YUANG, ZHANG MENGFAN, YUAN TIANHAO, Numerical investigation on temperature-dependence of luminous properties of blue/violet LEDs, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 7-8, pp. 278-287 (2024)