Optimization of hybrid blue organic light-emitting diodes based on singlet and triplet exciton diffusion length
- Authors
- Lee, Song Eun; Lee, Ho Won; Lee, Jae Woo; Hwang, Kyo Min; Park, Soo Na; Yoon, Seung Soo; Kim, Young Kwan
- Issue Date
- Jun-2015
- Publisher
- IOP PUBLISHING LTD
- Citation
- JAPANESE JOURNAL OF APPLIED PHYSICS, v.54, no.6
- Journal Title
- JAPANESE JOURNAL OF APPLIED PHYSICS
- Volume
- 54
- Number
- 6
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/9827
- DOI
- 10.7567/JJAP.54.06FG09
- ISSN
- 0021-4922
- Abstract
- The hybrid blue organic light-emitting diodes (HB OLEDs) with triplet harvesting (TH) structures within an emitting layer (EML) are fabricated with fluorescent and phosphorescent EMLs. The TH is to transfer triplet excitons from fluorescence to phosphorescence, where they can decay radiatively. Remarkably, the half-decay lifetime of a hybrid blue device with fluorescent and phosphorescent EML thickness of 5 and 25 nm, measured at an initial luminance of 500 cd/m(2), has improved twice than that of using a conventional structure. Additionally, the blue device's efficiency improved. We attribute this improvement to the efficient triplet excitons energy transfer and the optimized distribution of the EML which depends on singlet and triplet excitons diffusion length that occurs within each the EML. (C) 2015 The Japan Society of Applied Physics
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Science > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.