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학술지 Down-conversion Light Outcoupling Films using Imprinted Microlens Arrays for White Organic Light-emitting Diodes
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저자
오지윤, 김진희, 서윤경, 주철웅, 이종희, 이정익, 유승건, 윤창훈, 강문희, 최범호, 김용현
발행일
201701
출처
Dyes and Pigments, v.136, pp.92-96
ISSN
0143-7208
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.dyepig.2016.08.017
협약과제
16PB1800, AMOLED TV용 soluble TFT 및 화소 형성 소재/공정 기술 개발, 이종희
초록
We have developed down-conversion outcoupling films to enhance the light outcoupling efficiency in white organic light-emitting diodes (OLEDs). The down-conversion outcoupling films consist of outcoupling structures and color conversion materials, which are prepared by a simple solution-based micro-imprint process and are adopted into OLEDs. The down-conversion films successfully realize white light by converting blue rays from blue phosphorescent OLED. The OLEDs based on the down-conversion films with outcoupling structures show a great improvement of power efficiency by a factor of 1.32 compared to the reference OLED based on down-conversion films without outcoupling structures. Furthermore, the influence of a concentration of color conversion materials on color rendering index of OLEDs is investigated. The results strongly indicate that readily fabricated down-conversion light outcoupling films by a simple micro-imprint process are highly promising for enhanced light extraction performance and high color rendering index of white OLEDs.
키워드
Color conversion, Light extraction, Organic light-emitting diodes, Outcoupling structures, White OLED
KSP 제안 키워드
Conversion material, Light outcoupling, Microlens array, Organic light-emitting diodes(OLEDS), Power Efficiency, White organic light-emitting diodes, blue phosphorescent OLED, color conversion, conversion films, down-conversion, high color rendering index