TY - JOUR
T1 - AlGaInP Red LEDs with Hollow Hemispherical Polystyrene Arrays
AU - Cheng, Wen Ching
AU - Huang, Shih Yung
AU - Chen, Yi Jiun
AU - Wang, Chia Sheng
AU - Lin, Hoang Yan
AU - Wu, Tzong Ming
AU - Horng, Ray-Hua
PY - 2018/12/1
Y1 - 2018/12/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85040776518&partnerID=8YFLogxK
U2 - 10.1038/s41598-018-19405-y
DO - 10.1038/s41598-018-19405-y
M3 - Article
C2 - 29343786
AN - SCOPUS:85040776518
SN - 2045-2322
VL - 8
JO - Scientific reports
JF - Scientific reports
IS - 1
M1 - 911
ER -