Theoretical and experimental analysis of the effects of the series resistance on luminous efficacy in GaN-based light emitting diodes

In this paper, a new equivalent circuit model of GaN-based light emitting diodes （LEDs） is established. The impact of the series resistance to luminous efficacy is simulated using the MATLAB software. GaN-based LEDs with different n- contact electrode materials （LEDs with Ni/Au and LEDs with Cr/Au）...

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Published inChinese physics B Vol. 23; no. 11; pp. 630 - 633
Main Author 马莉 沈光地 刘建朋 高志远 徐晨 王勋
Format Journal Article
LanguageEnglish
Published 01.11.2014
Subjects
Chromium
Computer programs
Computer simulation
Equivalent circuits
GaN
Light-emitting diodes
Luminous efficacy
MATLAB
Nickel
Software
串联电阻
制造过程
发光二极管
发光效率
实验分析
等效电路模型
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ISSN1674-1056
2058-3834
1741-4199
DOI10.1088/1674-1056/23/11/118507

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Summary:In this paper, a new equivalent circuit model of GaN-based light emitting diodes （LEDs） is established. The impact of the series resistance to luminous efficacy is simulated using the MATLAB software. GaN-based LEDs with different n- contact electrode materials （LEDs with Ni/Au and LEDs with Cr/Au） are fabricated. By comparing and analyzing the results of performances, we concluded that both the series resistance and the carrier loss could affect the luminous efficacy severely. LEDs with lower series resistance have higher luminous efficacy and its efficiency droop is alleviated simultaneously. To improve luminous efficacy, the fabrication process should be optimized for lower series resistance.
Bibliography:GaN-based light emitting diodes, series resistance, luminous efficacy
In this paper, a new equivalent circuit model of GaN-based light emitting diodes （LEDs） is established. The impact of the series resistance to luminous efficacy is simulated using the MATLAB software. GaN-based LEDs with different n- contact electrode materials （LEDs with Ni/Au and LEDs with Cr/Au） are fabricated. By comparing and analyzing the results of performances, we concluded that both the series resistance and the carrier loss could affect the luminous efficacy severely. LEDs with lower series resistance have higher luminous efficacy and its efficiency droop is alleviated simultaneously. To improve luminous efficacy, the fabrication process should be optimized for lower series resistance.
Ma Li, Shen Guang-Di, Liu Jian-Peng, Gao Zhi-Yuan, Xu Chen, and Wang Xun（ Key Laboratory of Opto-electronics Technology of Ministry of Education, Beijing University of Technology, Beijing 100124, China）
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/11/118507