具有空心半球形聚苯乙烯阵列的 AlGaInP 红光 LED。

AlGaInP Red LEDs with Hollow Hemispherical Polystyrene Arrays.

机构信息

Graduate Institute of Precision Engineering, National Chung Hsing University, Taichung, 402, Taiwan, R.O.C.

Department of Industrial Engineering and Management, Da-Yeh University, Changhua, 515, Taiwan, R.O.C.

出版信息

Sci Rep. 2018 Jan 17;8(1):911. doi: 10.1038/s41598-018-19405-y.

DOI:10.1038/s41598-018-19405-y

PMID:29343786

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5772439/

Abstract

A hollow hemispherical polystyrene (HHPS) was fabricated to reduce total internal reflection in AlGaInP-based LEDs. At an injection current of 350 mA, the external quantum efficiencies of LED-I, LED-II, LED-III, and LED-IV are 20.92%, 24.65%, 27.28%, and 33.77% and the wall-plug efficiencies are 17.11%, 20%, 22.5%, and 27.33%, respectively. The enhanced performance is attributed to the light output power enhancement through the surface roughness, microlens-liked PS hemisphere, and scatter-liked HHPS array. In this paper, the rigorous coupled wave analysis (RCWA) numerical method was also conducted to demonstrate the HHPS array effectively enlarge the effective light cone.

摘要

为了减少 AlGaInP 基发光二极管中的全内反射，制作了一个中空半球形聚苯乙烯（HHPS）。在 350mA 的注入电流下，LED-I、LED-II、LED-III 和 LED-IV 的外量子效率分别为 20.92%、24.65%、27.28%和 33.77%，而功率效率分别为 17.11%、20%、22.5%和 27.33%。性能的提高归因于通过表面粗糙度、微透镜状 PS 半球和散射状 HHPS 阵列增强光输出功率。在本文中，还采用严格耦合波分析（RCWA）数值方法证明了 HHPS 阵列有效地扩大了有效光束。