標題: Phosphorescence of red Os(fptz)(2)(PPh2Me)(2) doped organic light-emitting devices with n and p hosts
作者: Liu, TH
Hsu, SF
Ho, MH
Liao, CH
Wu, YS
Chen, CH
Tung, YL
Wu, PC
Chi, Y
光電工程學系
Department of Photonics
公開日期: 6-Feb-2006
摘要: We have applied a stericly-hindered red phosphorescent dopant Os(fptz)(2)(PPh2Me)(2) [fptz=3-trifluoromethyl-5-(2-pyridyl)-1,2,4-triazole, PPh2Me=phosphine ligand] in p-type 4,4(')-N,N-'-dicarbazole-biphenyl or n-type bis(2-methyl-8-quinolinolato)(p-phenylphenolato) aluminum host and found that the latter produced higher luminance efficiency at lower doping concentration. We present a model to rationalize this phenomenon in which the n-type host impedes hole transport, which leads to narrower recombination zone near the hole transport layer/emission layer interface than the p-type host, hence, more effective recombination.
URI: http://dx.doi.org/10.1063/1.2172405
http://hdl.handle.net/11536/12635
ISSN: 0003-6951
DOI: 10.1063/1.2172405
期刊: APPLIED PHYSICS LETTERS
Volume: 88
Issue: 6
結束頁: 
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