A systematic identification of efficiency enrichment between thiazole and benzothiazole based yellow iridium(III) complexes

被引：24

作者：

Giridhar, Thota ^{[1
,2
]}

Cho, Woosum ^{[1
,2
]}

Kim, Young-Hoon ^{[3
]}

Han, Tae-Hee ^{[3
]}

Lee, Tae-Woo ^{[3
]}

Jin, Sung-Ho ^{[1
,2
]}

机构：

[1] Pusan Natl Univ, Grad Dept Chem Mat, Dept Chem Educ, Pusan 609735, South Korea

[2] Pusan Natl Univ, Inst Plast Informat & Energy Mat, Pusan 609735, South Korea

[3] Pohang Inst Sci & Technol, Dept Mat Sci & Engn, POSTECH, Pohang 790784, Gyungbuk, South Korea

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2014年 / 2卷 / 44期

基金：

新加坡国家研究基金会;

关键词：

LIGHT-EMITTING-DIODES; RED; PERFORMANCE; ORANGE;

D O I：

10.1039/c4tc01514b

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Four cyclometalated heteroleptic Ir(III) complexes [(Et-Cz-BTz)(2)Ir(pic)], [(Et-Cz-BTz)(2)Ir(pic-N-O)], [(Et-Cz-BTz)(2)Ir(EO2-pic)], and [(Et-Cz-BTz)(2)Ir(EO2-pic-N-O)] containing benzothiazole linked ethylcarbazole (Et-Cz-BTz) as a main ligand have been successfully synthesized for solution-processed phosphorescent organic light-emitting diodes (PhOLEDs). All the Ir(III) complexes emit bright yellow (541-582 nm) phosphorescence at room temperature. Among the four Ir(III) complexes, the [(Et-Cz-BTz)(2)Ir(EO2-pic)] showed the best luminous efficiency of 60 cd A(-1) and external quantum efficiency (EQE) of 19% with CIE coordinates (0.467, 0.524), which is one of the best efficiencies for solution-processed yellow PhOLEDs using heteroleptic Ir(III) complexes as an emitting layer. Interestingly, upon replacing the thiazole linking group in the main ligand by benzothiazole, the EQE increased from 6.08 to 19%.

引用

页码：9398 / 9405

页数：8

共 32 条

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