AlGaInP LED出光效率的模拟

采用有限元法来模拟研究采用透明电极AlGaInP LED出光效率的影响因素和分布情况,并在此基础上对不透明电极进行优化以提高芯片的出光效率。研究发现,随着窗口层厚度的增加,顶面出光效率有所下降,侧面出光效率大大提高,总出光效率呈上升趋势,且总出光效率的最高分布区从芯片的四个直角区域向中央圆形电极边缘靠近。然而,随着芯片尺寸的增加,其变化趋势正好与之相反。在此基础上进一步对普通生产芯片进行模拟分析,得知其光提取效率最高区主要分布在芯片的四个直角区域,并以此为指导进行不透明电极形状的优化,进而对其条形电极的宽度进行优化,可使所获得的出光效率比传统圆形电极提高了62.85％,能够为实际生产提供一定的理论指导。

The Simulation of AlGaInP LED's Light Output Efficiency

We used finite element method to simulate affecting factors and distribution of quaternary AlGaInP LED's output efficiency of light with transparent electrode,and found that the thickness of window layer and size of the chip have important impact on them.With thickness increasing,the top surface's output efficiency of light decreases a little,but the sides's output efficiency of light increases a lot,so the overall output efficiency of light presents rises a trend;and as increasing the thickness of window l...