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Triplet host engineering for triplet exciton management in phosphorescent organic light-emitting diodes

Cited 38 time in Web of Science Cited 42 time in Scopus
Authors
Kim, Sung Hyun; Jang, Jyongsik; Yook, Kyoung Soo; Lee, Jun Yeob; Gong, Myoung-Seon; Ryu, Sangouk; Chang, Gee-keun; Chang, Ho Jung
Issue Date
2008-03-04
Publisher
American Institute of Physics
Citation
J. Appl. Phys. 103, 054502
Abstract
The device performances of green phosphorescent organic light-emitting diodes with a triplet mixed host emitting layer were correlated with the energy levels and composition of the host materials. Two hole-transport-type host materials, (4,4-N,N -dicarbazole)biphenyl (CBP) and 4,4 ,4 -
tris(N-carbazolyl)triphenylamine (TCTA), were combined with two electron-transport-type host materials, 1,3,5-tris(N-phenylbenzimidazole-2-yl)benzene (TPBI) and PH1. The maximum quantum efficiency was obtained in the 5:5 mixed host in the case of TCTA:TPBI and TCTA:PH1, while CBP:PH1 showed the best performances in the 9:1 mixed host. The quantum efficiency of the green mixed host devices was improved by more than 50% compared with that of the corresponding single host devices.
ISSN
0021-8979
Language
English
URI
http://hdl.handle.net/10371/49000
DOI
https://doi.org/10.1063/1.2841058
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Chemical and Biological Engineering (화학생물공학부)Journal Papers (저널논문_화학생물공학부)
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