Recombination zone shift in phosphorescent white organic light-emitting devices with single host structure of multi-emission layers
- Authors
- Seo, Yu-Seok; Moon, Dae-Gyu
- Issue Date
- Sep-2014
- Publisher
- The Korean Physical Society
- Keywords
- OLED; Phosphorescence; White; Single host multi-emission layers; Recombination zone shift
- Citation
- Current Applied Physics, v.14, no.9, pp 1188 - 1191
- Pages
- 4
- Journal Title
- Current Applied Physics
- Volume
- 14
- Number
- 9
- Start Page
- 1188
- End Page
- 1191
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/11913
- DOI
- 10.1016/j.cap.2014.06.013
- ISSN
- 1567-1739
1878-1675
- Abstract
- We have investigated the recombination zone in the phosphorescent white organic light-emitting devices with single host structure of multi-emission layers. Blue, green, and orange-red phosphorescent emitters were doped into the separate layers of single host material for fabricating the white devices with multi-emission layers. The electroluminescence spectrum was substantially modified by the shift of the recombination zone that was dependent upon the thickness of the electron transport layer. We investigated the recombination zone shift in terms of electric field distribution and carrier injection. A maximum external quantum efficiency of 15.9% and a maximum power efficiency of 28.9 lm/W were achieved by optimizing the recombination zone. (C) 2014 Elsevier B.V. All rights reserved.
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Collections - College of Engineering > Department of Display Materials Engineering > 1. Journal Articles
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