物理学报2012，Vol.61Issue(20)：538-546,9.
基于缺陷光子晶体结构的GaN基发光二极管光提取效率的有关研究
Study on the light extraction efficiency of GaN-based light emitting diode by using the defects of the photonic crystals
摘要
Abstract
Many studies have shown that the photonic crystals and surface nanostructures can improve the light extraction efficiency of light emitting diode (LED). The defects and disorders exist in photonic crystals inevitably as the manufacturing technology limitations, and so the light extraction efficiency of LED will be changed correspondingly. In this work we perform a simulation study on defects and disorder of photonic crystals by the finite-difference time-domain (FDTD) method, and we speed up the FDTD by GPU acceleration technology. Simulation results show that a small number of defects in photonic crystals LED do not reduce the LED light extraction efficiency. Instead, the light extraction efficiency of LED will be increased by adding some defects into the photonic crystals. We give a detailed analysis of its physical mechanism. We design a kind of photonic crystals with defects, and its light extraction efficiency achieves 1.6 times that of the perfect photonic crystals.关键词
发光二极管/光子晶体/光提取效率/时域有限差分Key words
light emitting diode/photonic crystals/light extraction efficiency/finite-difference time-domain分类
信息技术与安全科学引用本文复制引用
岳庆炀,孔凡敏,李康,赵佳..基于缺陷光子晶体结构的GaN基发光二极管光提取效率的有关研究[J].物理学报,2012,61(20):538-546,9.基金项目
国家重点基础研究发展计划,(批准号：2009CB930503,2009CB930501)和国家自然科学基金,(批准号：61077043)资助的课题. （批准号：2009CB930503,2009CB930501）
