Tunable emission of polymer light emitting diodes bearing green-emitting Ir(III) complexes: The structural role of 9-((6-(4-fluorophenyl)pyridin-3-yl)methyl)-9H-carbazole ligands

被引：36

作者：

Cho, Min Ju ^{[1
]}

Jin, Jung-Il ^{[1
]}

Choi, Dong Hoon ^{[1
]}

Yoon, Jung Hee ^{[1
]}

Hong, Chang Seop ^{[1
]}

Kim, Young Min ^{[2
]}

Park, Young Wook ^{[2
]}

Ju, Byeong-Kwon ^{[2
]}

机构：

[1] Korea Univ, Dept Chem, Adv Mat Chem Res Ctr, Seoul 136701, South Korea

[2] Korea Univ, Display & Nanosyst Lab, Coll Engn, Seoul 136701, South Korea

来源：

DYES AND PIGMENTS | 2010年 / 85卷 / 03期

关键词：

Iridium(III) complex; Ligand; Solubility; Photoluminescence; Triplet energy transfer; Electrophosphorescence; CYCLOMETALATED IRIDIUM(III) COMPLEXES; ELECTROPHOSPHORESCENT DEVICES; EFFICIENCY; PHOSPHORESCENCE; DENDRIMERS; LAYER;

D O I：

10.1016/j.dyepig.2009.10.017

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

9-((6-Phonylpyridin-3-yl)methyl)-9H-carbazole and 9-((6-(4-fluorophenyl)pyridin-3-yl)methyl)-9H-carbazole were synthesized as ligands by attaching a carbazolyl group to the pyridine in 2-phenylpyridine and 2-(4-fluorophenyl)pyridine, respectively. Four different Ir(III) complexes were prepared using a simple procedure, the solubility of which was significantly greater than that of conventional green-emitting Ir(ppy)(3). Among the many devices fabricated, that which contained 10% of Ir(Cz-ppy)(1)(Cz-Fppy)(2) in PVK/PBD (70:30 wt%), exhibited an external quantum efficiency of 6.80%, luminous efficiency of 20.23 cd/A, and maximum brightness of 17520 cd/m(2). In particular, the electronic property of the new 9-((6-(4-fluorophenyl)pyridin-3-yl)methyl)-9H-carbazole ligand can manipulate the triplet energy level of the Ir(Ill) complex to finely tune the emission spectra. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：143 / 151

页数：9

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