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Journal Article
Efficient and Color Stable Phosphorescent White Organic Light-Emitting Devices based on an Ultra Wide Band-Gap Host
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- Authors
- Jong Hee Lee, Jeong Ik Lee, Hye Yong Chu
- Issue Date
- 2009-05
- Citation
- Synthetic Metals, v.159, no.11, pp.991-994
- ISSN
- 0379-6779
- Publisher
- Elsevier
- Language
- English
- Type
- Journal Article
- Abstract
- 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 Keywords
- 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