[12.05월] 이종람 교수 연구실
Design Rule of Nanostructures in Light-Emitting Diodes for Complete Elimination of Total Internal Reflection
Advanced Materials. 24, 17, 2259–2262 (2012)
LED 구조에서 최적의 나노 구조를 계산하는 방법을 제시하고 이를 이용하여 광추출효율을 최대화시켜 기존 구조보다 300% 향상된 고효율 LED를 구현
Cone-shaped nanostructures with controllable side-wall angle are success- fully fabricated with a SiO2 nanosphere lithography (NSL) etching mask. Vertical LEDs with cone-shaped nanostructures with a 24.1° side-wall angle provide 6% more light output power compared to those using hexagonal pyramids formed by photochemical etching. This achievement is attributed to effective elimination of total internal reflection by angle-controlled nanostructures.