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大功率GaN基LED的提取效率 被引量:1

Light Extraction Efficiency of High-Power GaN-Based Light-Emitting Diodes
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摘要 影响GaN基LED效率的主要因素是内量子效率和提取效率.蓝光GaN基的LED内量子效率可达70%以上,紫外GaN基LED可达80%,进一步改善的空间较小.而传统大面积结构GaN基LED由于全反射和吸收等原因,外提取效率只有百分之几,提高空间很大.本文从几何和物理光学角度分析了影响GaN基LED外提取效率的因素,针对全反射、吸收、横向光波导等问题总结了现有的各种提高GaN基LED提取效率的手段及其优缺点.
出处 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2005年第z1期170-175,共6页 半导体学报(英文版)
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