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학술지 Efficient and Color Stable Phosphorescent White Organic Light-Emitting Devices based on an Ultra Wide Band-Gap Host
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저자
이종희, 이정익, 추혜용
발행일
200905
출처
Synthetic Metals, v.159 no.11, pp.991-994
ISSN
0379-6779
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.synthmet.2008.12.031
협약과제
08IB3200, 고효율 백색 OLED 소자 기술 개발, 추혜용
초록
We report high efficiency phosphorescent white organic light-emitting devices (WOLEDs) employing single emissive layer (EML) based on an ultra wide band-gap host. Effective exciton/charge confinement and balanced recombination within EML was achieved by employing adequate interlayer and stepwise hole-transporting layer (step HTL) system. Moreover, this step HTL system lower driving voltage of WOLEDs, therefore power efficiency was enhanced over 40%. These WOLEDs showed external quantum, and power efficiencies of 17.6%, and 37.5 lm/W at 100 cd/m2 without outcoupling enhancements. We also found that these WOLEDs exhibited little change of color coordinate from 100 to 10,000 cd/m2. Crown Copyright © 2009.
키워드
Organic light-emitting diodes (OLEDs), Phosphorescent, White OLED
KSP 제안 키워드
Hole transporting layer, Organic light-emitting device(OLED), Organic light-emitting diodes(OLEDS), Power Efficiency, Ultra-Wide Band(UWB), Wide Band Gap, color coordinates, emissive layer(EL), high efficiency, light-emitting diode(LED), lower driving voltage