Low efficiency roll off at high current densities in Ir-complex based electrophosphorescence diode with exciton diffusing and fluorescence compensating layers

	Low efficiency roll off at high current densities in Ir-complex based electrophosphorescence diode with exciton diffusing and fluorescence compensating layers
其他题名	论文其他题名
	Zhang D. Y.; Li W. L.; Chu B.; Zhu J. Z.; Li T. L.; Han L. L.; Bi D. F.; Li X.; Yang D. F.; Yan F.; Liu H. H.; Wang D.; Tsuboi T.
	2007
发表期刊	Applied Physics Letters
ISSN	0003-6951
卷号	91 期号:18
摘要	We demonstrate a fac-tris(2-phenylpyridine) iridium-based electrophosphorescent organic green-light emitting diode with a considerably reduced current-efficiency roll off at high current density. Such a low roll off of efficiency was achieved by inserting nondoped 4,4'-N,N'-dicarbazole-biphenyl (CBP) layer and a tris-(8-hydroxy-quinoline) aluminum (Alq(3)) layer between the emitting and electron-transporting layers to diffuse excitons from the emitting layer. The Alq(3) layer is found to contribute as a complementary green fluorescent emitter at high current density. Thus, only a small decrease from 20.7 to 16.7 cd/A was detected in current efficiency when the current density increases from 3.9 to 100 mA/cm(2). A high current efficiency of 12.6 cd/A was achieved even at 350 mA/cm(2), indicating that the efficiency roll off was drastically reduced when compared with the device without CBP and Alq(3) layers. (C) 2007 American Institute of Physics.
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/24873
专题	中科院长春光机所知识产出
推荐引用方式 GB/T 7714	Zhang D. Y.,Li W. L.,Chu B.,et al. Low efficiency roll off at high current densities in Ir-complex based electrophosphorescence diode with exciton diffusing and fluorescence compensating layers[J]. Applied Physics Letters,2007,91(18).
APA	Zhang D. Y..,Li W. L..,Chu B..,Zhu J. Z..,Li T. L..,...&Tsuboi T..(2007).Low efficiency roll off at high current densities in Ir-complex based electrophosphorescence diode with exciton diffusing and fluorescence compensating layers.Applied Physics Letters,91(18).
MLA	Zhang D. Y.,et al."Low efficiency roll off at high current densities in Ir-complex based electrophosphorescence diode with exciton diffusing and fluorescence compensating layers".Applied Physics Letters 91.18(2007).

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