Effects of Electrode Structure on The Current Distribution of AlGaInP-LED Array

YIN Yue; LIANG Jing-qiu; LIANG Zhong-zhu; WANG Wei-biao

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Effects of Electrode Structure on The Current Distribution of AlGaInP-LED Array

paper | 更新时间：2020-08-12

- Effects of Electrode Structure on The Current Distribution of AlGaInP-LED Array
- Chinese Journal of Luminescence Vol. 32, Issue 10, Pages: 1051-1056(2011)
- 作者机构：
  
  1. 中国科学院研究生院北京,100049
  2. 中国科学院长春光学精密机械与物理研究所应用光学国家重点实验室,吉林长春,130022
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN312.8
- Received：20 June 2011，
  
  Revised：2011-7-13，
  
  Published Online：22 October 2011，
  
  Published：22 October 2011
- 稿件说明：
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尹悦, 梁静秋, 梁中翥, 王维彪. 电极结构对AlGaInP-LED阵列电流分布的影响[J]. 发光学报, 2011,32(10): 1051-1056

YIN Yue, LIANG Jing-qiu, LIANG Zhong-zhu, WANG Wei-biao. Effects of Electrode Structure on The Current Distribution of AlGaInP-LED Array[J]. Chinese Journal of Luminescence, 2011,32(10): 1051-1056
尹悦, 梁静秋, 梁中翥, 王维彪. 电极结构对AlGaInP-LED阵列电流分布的影响[J]. 发光学报, 2011,32(10): 1051-1056 DOI：

YIN Yue, LIANG Jing-qiu, LIANG Zhong-zhu, WANG Wei-biao. Effects of Electrode Structure on The Current Distribution of AlGaInP-LED Array[J]. Chinese Journal of Luminescence, 2011,32(10): 1051-1056 DOI：

摘要

以AlGaInP-LED外延片为基片

设计了分辨率为320240、像素尺寸为100 m100 m的微型LED阵列。针对目前LED阵列普遍存在的电流分布不均匀的问题

建立了内部电流分布模型

研究了电极结构、电极尺寸及电极间距等不同因素对LED电流分布造成的影响。在单条形电极结构的基础上进行优化

综合考虑不透明电极的遮光效应等因素得到三条形电极结构为最优的电极结构

该电极结构的LED有源层均匀发光面积比未经优化的单条形电极提高了65.02%

比双条形电极提高25.63%

有效提高了微型LED阵列的出光效率

对改善LED芯片发光均匀性具有参考意义。

Abstract

An array of 320240 micro-LED is designed based on AlGaInP epitaxial wafer. The pixel size is 100 m100 m.The optical properties of LED array are affected by the current crowding effect

which is a universal problem in LED array. By simulating the active layer current distribution

effects of some factors including electrode structure

width of electrode and distance between electrodes on the current distribution of LED array are studied. The tri-strip electrode is proposed as an optimized structure of the top electrode. Considering some important details such as the light shading effect

the tri-strip electrode is the best electrode shape comparing with one-strip electrode and bi-strip electrode. The optimized electrode leads to the more uniform current spreading.The uniform lighting area of active layer increase 65.02% and 25.63% than that one strip electrode and bi-strip electrode

respectively. The light emission efficiency of the micro-LED array can be improved.

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references

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