New Bipolar Host Materials for Realizing Blue Phosphorescent Organic Light-Emitting Diodes with High Efficiency at 1000 cd/m2

被引：38

作者：

Cho, Min Ju ^{[1
]}

Kim, Sun Jae ^{[1
]}

Yoon, Seung Hee ^{[1
]}

Shin, Jicheol ^{[1
]}

Hong, Tae Ryang ^{[1
]}

Kim, Hyung Jong ^{[1
]}

Son, Young Hoon ^{[2
]}

Kang, Ju Sik ^{[1
]}

Um, Hyun Ah ^{[1
]}

Lee, Tae Wan ^{[1
]}

Bin, Jong-Kwan ^{[3
]}

Lee, Bang Sook ^{[3
]}

Yang, Joong Hwan ^{[3
]}

Chae, Gee Sung ^{[3
]}

Kwon, Jang Hyuk ^{[2
]}

Choi, Dong Hoon ^{[1
]}

机构：

[1] Korea Univ, Res Inst Nat Sci, Dept Chem, Seoul 136701, South Korea

[2] Kyung Hee Univ, Dept Informat Display, Seoul 130701, South Korea

[3] LG Display Co LTD, Paju Si 413811, Gyeonggi Do, South Korea

来源：

ACS APPLIED MATERIALS & INTERFACES | 2014年 / 6卷 / 22期

基金：

新加坡国家研究基金会;

关键词：

organic light emitting diode; phosphorescence; bipolar host; carboline; quantum efficiency; WHITE ELECTROPHOSPHORESCENT DEVICES; QUANTUM EFFICIENCY; ENERGY-TRANSFER; OLEDS; CARBAZOLE; DESIGN; GREEN;

D O I：

10.1021/am505049h

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

New host molecules such as 9-(6-(9H-carbazol-9-yl)pyridin-3-yl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (pPCB2CZ) and 9-(6-(9H-carbazol-9-yl)pyridin-2-yl)-6-(9H-carbazol-9-yl)-9H-pyrido[2,3-b]indole (mPCB2CZ) were designed and synthesized for blue phosphorescent organic light-emitting diodes (PhOLEDs). The glass transition temperatures of two host molecules were measured higher than 120 degrees C, and the identical triplet energies were determined to be 2.92 eV for both molecules. The bis(3,5-difluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (FIrpic)-doped mPCB2CZ-based PhOLED exhibited practically useful driving voltage of 4.8 V in a simple organic three layer device configuration which has a smaller number of interfaces in conventional multilayer PhOLEDs. Also, the high quantum efficiency of 23.7% is reported at the practically useful brightness value of 1000 cd/m(2).

引用

页码：19808 / 19815

页数：8

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