標題: Highly efficient red electrophosphorescent devices based on an iridium complex with trifluoromethyl-substituted pyrimidine ligand
作者: Niu, YH
Chen, BQ
Liu, S
Yip, H
Bardecker, J
Jen, AKY
Kavitha, J
Chi, Y
Shu, CF
Tseng, YH
Chien, CH
應用化學系
Department of Applied Chemistry
公開日期: 30-Aug-2004
摘要: Highly efficient red-emitting electrophosphorescent devices were fabricated by doping an iridium (Ir) complex containing trifluoromethyl (CF3)-substituted pyrimidine ligand into a conjugated bipolar polyfluorene with triphenylamine and oxadiazole as side chains. The device efficiency can be enhanced through effective exciton confinement using a layer of 1,3,5-tris(N- phenylbenzimidazol-2-yl)benzene on the cathode side and a layer of in situ polymerized tetraphenyldiamine-perfluorocyclobutane on the anode side. For a blend with 5 wt % of the Ir complex, a maximum external quantum efficiency of 7.9 photon/electron % and a maximum brightness of 15800 cd/m(2) are reached with Commission Internationale de L'Eclairage chromaticity coordinates of x=0.65 and y=0.34. (C) 2004 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.1786369
http://hdl.handle.net/11536/26453
ISSN: 0003-6951
DOI: 10.1063/1.1786369
期刊: APPLIED PHYSICS LETTERS
Volume: 85
Issue: 9
起始頁: 1619
結束頁: 1621
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