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: | 30-八月-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 |
顯示於類別: | 期刊論文 |