Journal
APPLIED PHYSICS LETTERS
Volume 90, Issue 22, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2742788
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- National Research Foundation of Korea [R11-1999-064-09001-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Device performances of green phosphorescent organic light-emitting diodes using (4,4'-N,N-'-dicarbazole)biphenyl (CBP) and N,N-'-dicarbazolyl-3,5-benzene (mCP) as an exciton blocking layer were investigated. CBP and mCP were introduced between hole transport layer and emitting layer to block triplet exciton quenching and efficient hole transport to emitting layer. The efficiency of green devices could be improved by more than three times by using mCP exciton blocking layer. (C) 2007 American Institute of Physics.
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