標題: Highly efficient red organic light-emitting devices based on a fluorene-triphenylamine host doped with an Os(II) phosphor
作者: Wu, Chen-Hao
Shih, Ping-I
Shu, Ching-Fong
Chi, Yun
應用化學系
Department of Applied Chemistry
公開日期: 9-Jun-2008
摘要: We report highly efficient red-light-emitting devices based on a fluorene-triphenylamine tris[4-(9-phenylfluoren-9-yl)phenyl]amine (TFTPA) host doped with an osmium phosphor. The sterically hindered fluorene peripheries provided a compatible environment for the osmium dopant and alleviated concentration quenching of the phosphor at high doping levels. Increasing the doping concentration from 7 to 21 wt % dramatically decreased the driving voltage of the TFTPA-based devices, leading to improved power efficiency. The 21 wt % Os-doped device exhibited maximum luminous and powder efficiencies of 29.9 cd/A and 25.2 lm/W, combined with high efficiencies at high brightness. At 1000 cd/m(2) the efficiencies remained 29.2 cd/A and 22.2 lm/W. (C) 2008 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2943155
http://hdl.handle.net/11536/8725
ISSN: 0003-6951
DOI: 10.1063/1.2943155
期刊: APPLIED PHYSICS LETTERS
Volume: 92
Issue: 23
結束頁: 
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