Highly efficient electrophosphorescence devices based on iridium complexes with high efficiency over a wide range of current densities

	Highly efficient electrophosphorescence devices based on iridium complexes with high efficiency over a wide range of current densities
其他题名	论文其他题名
	Zhang L. Y.; Chen P.; Li B.; Hong Z. R.; Liu S. Y.
	2008
发表期刊	Journal of Physics D-Applied Physics
ISSN	0022-3727
卷号	41 期号:24
摘要	Three new luminescent cyclometalated iridium (III) complexes are successfully synthesized. The cyclometalated ligand used here is 2-(2-fluorophenyl)-benzothiazole (F-BT). The auxiliary ligands are acetylacetone (acac), 1,1,1-trifluoroacetylaceton (3F-acac), 1,1,1,5,5,5-hexafluoroacetylacetone (6F-acac), respectively. All complexes exhibit bright photoluminescence at room temperature. Organic light-emitting diodes are fabricated by doping the iridium (III) complexes in 4, 4'-N, N'-dicarbazole-biphenyl (CBP), and the device characteristics are investigated. Among these devices, the performances of the optimized devices based on 1 at high current density are among the best reported for devices with iridium (III) complexes as emitters. EL efficiencies show weak dependence on doping concentration and current density. The optimized device exhibits a peak current efficiency of 28.5 cd A(-1) and a power efficiency of 11.2 lm W(-1), respectively, at 20 mA cm(-2), an efficiency of 22.7 cd A(-1) at 100 mA cm(-2), 80% of the maximum, can be achieved. Short triplet decay time of 1 measured in solid films is supposed to be responsible for the minor loss in EL efficiency, which suggests depressed triplet-triplet annihilation and site saturation of the phosphor. Efficient exciton formation on the molecules of 1 by direct charge trapping and confinement within the emissive layer also make for outstanding electrophosphorescent performances.
收录类别	SCI ; EI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/26391
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang L. Y.,Chen P.,Li B.,et al. Highly efficient electrophosphorescence devices based on iridium complexes with high efficiency over a wide range of current densities[J]. Journal of Physics D-Applied Physics,2008,41(24).
APA	Zhang L. Y.,Chen P.,Li B.,Hong Z. R.,&Liu S. Y..(2008).Highly efficient electrophosphorescence devices based on iridium complexes with high efficiency over a wide range of current densities.Journal of Physics D-Applied Physics,41(24).
MLA	Zhang L. Y.,et al."Highly efficient electrophosphorescence devices based on iridium complexes with high efficiency over a wide range of current densities".Journal of Physics D-Applied Physics 41.24(2008).

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Zhang-2008-Highly ef（695KB）			开放获取	--	浏览下载