AlGaInP Red LEDs with Hollow Hemispherical Polystyrene Arrays

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....

Descripción completa

Detalles Bibliográficos
Autores principales: Cheng, Wen-Ching, Huang, Shih-Yung, Chen, Yi-Jiun, Wang, Chia-Sheng, Lin, Hoang Yan, Wu, Tzong-Ming, Horng, Ray-Hua
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2018
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5772439/
https://www.ncbi.nlm.nih.gov/pubmed/29343786
http://dx.doi.org/10.1038/s41598-018-19405-y
Descripción
Sumario: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.

Ejemplares similares