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Journal Article
Improvements of Phosphorescent White OLEDs Performance for Lighting Application
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- Authors
- Jong Hee Lee, Hye Yong Chu, Jeong-Ik Lee, Ki-Im Song, Su Jin Lee
- Issue Date
- 2008-10
- Citation
- Journal of Nanoscience and Nanotechnology, v.8, no.10, pp.5185-5187
- ISSN
- 1533-4880
- Publisher
- American Scientific Publishers (ASP)
- Language
- English
- Type
- Journal Article
- Abstract
- We developed white OLED device with high power efficiency, in which blue and orange phosphorescent emitters were used. By introduction of multi-functional interlayer which has partial doping of orange dopant inside EBL, we report WOLEDs with peak external efficiencies up to (14.1% EQE, 31.3 Im/W) without light out-coupling technique. At 1000 cd/m 2, the performance achieved was 11.9% EQE, 18.7 Im/W with CIE = (0.39, 0.44). We also found that WOLED performances are related with doping ratio of the orange dopant that was inserted inside EBL. Copyright © 2008 American Scientific Publishers All rights reserved.
- KSP Keywords
- Coupling technique, Doping ratio, Functional interlayer, Partial doping, Phosphorescent emitter, high power efficiency, light outcoupling, multi-functional, white OLEDs