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AlGaInP-LED微阵列单元的热效应分析

Thermal Analysis of AlGaInP-LED Mircro-cells

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摘要

对AlGaInP-LED微型阵列发光单元的内部自发热机制进行了分析, 并通过对具有回型上电极的发光单元的理论分析与计算, 得到了其内量子效率与注入电流的变化关系及器件温度与所加偏压的变化关系。为保证内量子效率取值范围大于85%, 得到了器件的最佳工作电流和最佳驱动电压范围以及微阵列各层结构在最佳驱动电压下的热阻分布。通过计算得出器件在2.2 V电压下, 从p-n结到外部环境的有效热阻为96.7 ℃/W。讨论了减小器件热阻的方法, 计算得出在理想情况下, 添加热沉结构后有效热阻降为30.6 ℃/W, 表明所设计的热沉结构对器件的散热起到了明显的改善作用。

Abstract

The principle of self-heating effect of AlGaInP micro-LED cells was analyzed. By analyzing the temperature distribution of each cell with square-circle electrode, the relationships of the internal quantum efficiency vs. anode current and the lattice device temperature vs. anode voltage were got. Under 2.2 V driving voltage, the thermal impedance of each layer was calculated and the effective thermal impedance was obtained as 96.7 ℃/W. After adding heat-sink to the device, the thermal impedance of the device with heat-sink structure was as low as 30.6 ℃/W in ideal condition. The results show that the thermal performance can be improved obviously with the designed heat-sink structure.

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中图分类号:TN312.8

DOI:10.3788/fgxb20143507.0840

所属栏目:器件制备及器件物理

基金项目:国家自然科学基金(61274122); 吉林省科技发展项目(20100351,20120323); 长春市科技发展计划(12ZX21)资助项目

收稿日期:2014-03-12

修改稿日期:2014-04-03

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田超: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 130033中国科学院大学, 北京 100049
梁静秋: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 130033
梁中翥: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 130033
秦余欣: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 130033
李春: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 130033
吕金光: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 130033
王维彪: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 130033

联系人作者:梁静秋(liangjq@ciomp.ac.cn)

备注:田超(1987-), 男, 吉林四平人, 硕士, 2011年于中国科学院微电子研究所获得硕士学位, 主要从事LED微阵列器件的设计与制备的研究。

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引用该论文

TIAN Chao,LIANG Jing-qiu,LIANG Zhong-zhu,QIN Yu-xin,Li Chun,LYU Jin-guang,WANG Wei-biao. Thermal Analysis of AlGaInP-LED Mircro-cells[J]. Chinese Journal of Luminescence, 2014, 35(7): 840-845

田超,梁静秋,梁中翥,秦余欣,李春,吕金光,王维彪. AlGaInP-LED微阵列单元的热效应分析[J]. 发光学报, 2014, 35(7): 840-845

被引情况

【1】包兴臻,梁静秋,梁中翥,秦余欣,吕金光,王维彪. 像素分割对LED电流密度及光照度分布的影响. 发光学报, 2016, 37(11): 1399-1407

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