Analysis of photonic crystal on LED extraction efficiency

作     者：丁庆安 郭晓涵 郭银景 孙红雨 

作者机构：Dept. of Communication Engineering Shandong University of Science and Technology Qingdao 266510 China School of Electronic Engineering University of Electronic Science and Technology of China Chengdu 611731 China 

出 版 物：《Journal of Measurement Science and Instrumentation》 (测试科学与仪器（英文版）)

年 卷 期：2012年第3卷第2期

页      面：191-195页

学科分类：08[工学] 0803[工学-光学工程] 

基　　金：National Natural Science Foundation of China(No.61071087) Reward Fund of Outstanding Youth and Middle Age Scientist of Shandong Province(No.BS2009N5002) 

主　　题：light-emitting diode(LED) photonic crystal(PhC) light extraction efficiency(LEE) mode analysis finite-difference time-domain method 

摘      要：Because of its very low light extraction efficiency(LEE),LED is limited to be widely used under the condition of the internal quantum efficiency which up to 90%.In order to fullfill the design of a more efficient GaN-based blue light LED,the model including deeply etched surface photonic crystals(PhCs)LED is discussed using mode analysis method from light waveguide *** distributions of all order modes in GaN layer are obtained by the effective index *** light extraction efficiencies are also calculated by finite-difference time-domain method(FDTD).The emulated results fully coincide with the former *** the manufacture of the surface photonic crystal is feasible,the work can be very meaningful to design and manufacture the high efficiency GaN-based blue light LED in factory for a large amount.