提高发光二极管出光效率的新方法  

A new approach to enhance the extraction efficiency of LED

作　　者：邓琛[1] 徐晨[1] 徐丽华[1] 邹德恕[1] 蒋文静[1] 戴天明[1] 李晓波[1] 沈光地[1] 

机构地区：[1]北京工业大学北京市光电子技术实验室,北京100124

出　　处：《光电子．激光》2009年第5期580-582,共3页Journal of Optoelectronics·Laser

基　　金：国家"863"计划资助项目(SQ2007AA03Z431230);北京市人才强教计划资助项目(05002015200504)

摘　　要：利用高分子共混物的微相分离和自组装原理,制备出具有纳米微孔的PMMA薄膜,以此为掩膜对发光二极管(LED)表面进行湿法腐蚀,得到表面微结构,并研究了腐蚀时间对表面形貌的影响。测试结果表明,当微孔直径在500nm左右、腐蚀深度约140nm时,所得到的表面微结构能使LED在20mA的注入电流下光功率平均提高18%。Based on the micro-phase separation and sell-assembly of polymer blends, a mask, in which many nano-holes distribute regularly, is developed from PS/PMMA blend film to fabricate mierostructure on GaP surface by wet etching. By employing this method on LED surface, when the diameter of the nano-holes in mask is around 500nm and the etch depth is 140nm, the LED output power increases by 18% in average.

关 键 词：表面微结构 自组装 发光二极管(LED) 出光效率 

分 类 号：TN383[电子电信—物理电子学]