表面粗化提高红光LED的光提取效率  

Enhancement of Extraction Efficiency of Red LED via Surface Roughening

作　　者：刘思南[1] 邹德恕[1] 张剑铭[1] 顾晓玲[1] 沈光地[1] 

机构地区：[1]北京工业大学电控学院光电子技术实验室,北京100022

出　　处：《固体电子学研究与进展》2008年第2期245-247,共3页Research & Progress of SSE

基　　金：北京市人才强教计划项目(批准号:05002015200504);北京市科委高效高亮度单芯片半导本照明器件的研发与产业化项目(批准号:D0404003040221)

摘　　要：介绍了通过出光表面粗糙化来减少全反射的方法,实验中使用化学湿法腐蚀的技术获得预计的粗糙形貌,结果给出不同参数下的光强和光辐射功率比较,器件的外量子效率得到了约29%的提高。从理论和测试结果两方面阐述了表面粗糙化对提高红光LED外量子效率的机理。This paper introduces a way of decreasing total reflection by roughening upper surface of an LED. The expected surface morphology is achieved by wet chemical etching. The light power and light intensity were measured. The light power is enhanced by about 29%. The effect of roughness on enhancing red LED＇s external quantum efficiency is demonstrated both theoretically and practically.

关 键 词：发光二极管 表面粗化 磷化镓 湿法腐蚀 取光效率 

分 类 号：TN383[电子电信—物理电子学]