Efficient Blue Phosphorescent Organic Light-Emitting Diodes by Tuning Iridium(III) Phenylpyridine Complexes

被引：10

作者：

Seo, Ji Hyun ^{[1
]}

Lee, Seung Chan ^{[1
]}

Kim, Young Kwan ^{[1
]}

Kim, Young Sik ^{[1
]}

机构：

[1] Hongik Univ, Dept Informat Display, Seoul 121791, South Korea

来源：

JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2009年 / 9卷 / 12期

关键词：

Electrophosphorescence; Substitution; Organic Light-Emitting Diode; IR(III) COMPLEXES; DEVICES;

D O I：

10.1166/jnn.2009.1656

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We demonstrated efficient blue electrophosphorescence using the Ir(OMeppy)(2)(acac) [OMeppy = 2-(phenyl)-4-methoxypyridine, acac = acetylacetonate], Ir[(CF3)(2)ppy](2)(acac) [(CF3)(2)ppy = 2-(3', 5'-bistrifluoromethyl phenyl)-pyridine], Ir[(CF3)(2)OMeppy](2)(acac) [(CF3)(2)OMeppy = 2-(3',5-bistrifluoromethyl phenyl)-4-methoxypyridine] based on Ir(ppy)(2)(acac) (ppy=phenylpyridine). The methoxy group was substituted on the 4-position of pyridyl ring as electron donating group (EDG) and the trifluoromethyl group was substituted on the 3'5'-position of phenyl ring as electron withdrawing group (EWG). The organic light-emitting diodes (OLEDs) with Ir(OMeppy)(2)(acac), Ir[(CF3)(2)ppy](2)(acac), Ir[(CF3)(2)OMeppy](2)(acac) and Ir(ppy)(2)(acac) have maximum luminous efficiency of 42.54 cd/A, 13.67 cd/A, 7.06 cd/A and 40.70 cd/A, respectively. Also, their electroluminescent (EL) emission appeared at 533 nm, 475 nm, 471 nm and 522 nm, respectively.

引用

页码：7048 / 7051

页数：4

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