高提取效率表面织构红光发光二极管

Surface Texture Red Light-emitting Diodes with High Extracting Efficiency

给出了用蒙特卡罗射线追踪法模拟发光二极管(LED)光提取效率的过程,并对表面织构LED的光提取效率进行了模拟分析,得到存在一组优化的表面织构参数,可使LED的光提取效率提高36%。通过湿法腐蚀和干法刻蚀相结合工艺,制备了表面织构的红光LED,器件的轴向光强提高了20.6%。理论和实验结果,表明表面织构技术是提高LED光提取效率的一个主要途径。

A Monte Carlo ray tracing method is provided to simulate the light extracting efficiency of the light-emitting diodes （LED）. The simulation results for the surface texture LED show that a 36% increment of the extracting efficiency can be reached by optimizing the texture parameters. The surface texture LED is fabricated by wet and dry etching, a 20.6% increment of the axis light intensity is obtained for the surface texture LED. Both the theory and the experiment results show that the surface texture technology is an effective method to increase the LED light extracting efficiency.