標題: Bright red-emitting electrophosphorescent device using osmium complex as a triplet emitter
作者: Kim, JH
Liu, MS
Jen, AKY
Carlson, B
Dalton, LR
Shu, CF
Dodda, R
應用化學系
Department of Applied Chemistry
公開日期: 28-Jul-2003
摘要: A series of efficient and bright double-layer light-emitting devices have been fabricated using the osmium (Os) complex as the triplet emissive dopant in both a blue-emitting polyfluorene derivative (PF-TPA-OXD) containing hole-transporting triphenylamine (TPA) and electron-transporting oxadiazole (OXD) as side chains and a blend of 2-(4-t-butylphenyl)-5(4-biphenylyl)-1,3,4-oxadizole (PBD) in poly(N-vinylcarbazole) (PVK). Due to a balanced charge injection and transport in PF-TPA-OXD and very efficient energy transfer from this polymer to the Os complex, the resulting device (indium tin oxide/HTL/OsCF3:PF-TPA-OXD/Ca/Ag) reaches a maximum external quantum efficiency of 2.1% with a peak brightness of 2920 cd/m(2). These results are significantly higher than those obtained from the commonly used host, PVK:PBD (0.49% and 1270 cd/m(2)). (C) 2003 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.1593230
http://hdl.handle.net/11536/27700
ISSN: 0003-6951
DOI: 10.1063/1.1593230
期刊: APPLIED PHYSICS LETTERS
Volume: 83
Issue: 4
起始頁: 776
結束頁: 778
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