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: | 6-二月-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: | |
顯示於類別: | 期刊論文 |