상세정보
학술지
Efficient and Color Stable Phosphorescent White Organic Light-Emitting Devices based on an Ultra Wide Band-Gap Host
- 발행일
- 200905
- 출처
- Synthetic Metals, v.159 no.11, pp.991-994
- ISSN
- 0379-6779
- 출판사
- Elsevier
- 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.
- KSP 제안 키워드
- Hole transporting layer, Organic light-emitting device(OLED), Power Efficiency, Ultra-Wide Band(UWB), Wide Band Gap, color coordinates, emissive layer(EL), high efficiency, lower driving voltage, white organic light-emitting devices