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UV-Nanoimprinted Photonic-Crystal Structure for Organic Light-Emitting Diodes
심종엽(Jongyoup Shim),전소희(Sohee Jeon),윤재륜(Jae-Ryoun Youn),강재욱(Jaewook Kang),김장주(Jang-Joo Kim),김세헌(Se-Heon Kim),정준호(Jun-ho Jeong),최대근(Dae-Geun Choi),김기돈(Ki-Don Kim),알리알툰(Ali Ozhan Altun),최준혁(Junhyuk Choi) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.10
A conventional OLED has only about 20 % light extraction efficiency. When a photonic crystal layer is put in between the anodic layer and the substrate, the light can be extracted to the air by the optical diffraction phenomena. In this article we form a photonic crystal layer (nano-patterned array) directly on the transparent substrate by the UV-nanoimprinting method with a polymer resin. By the FDTD simulation the enhancement of the light extraction is assessed. And the fabrication process details including UV-nanoimprint, SixNy interlayer and OLED layers are presented in this article. The experiment shows that with the imprinted photonic crystal structure the light extraction efficiency is increased by ~50% comparing with the conventional OLED and therefore this nanoimprinted photonic crystal OLED is a promising technology for the future OLED display and illuminator applications.