A new benzimidazole/carbazole hybrid bipolar material for highly efficient deep-blue electrofluorescence, yellow-green electrophosphorescence, and two-color-based white OLEDs

被引：204
|
作者：
Hung, Wen-Yi [1 ]
Chi, Liang-Chen [2 ]
Chen, Wei-Jiun [1 ]
Chen, You-Ming [2 ]
Chou, Shu-Hua [2 ]
Wong, Ken-Tsung [2 ]
机构：
[1] Natl Taiwan Ocean Univ, Inst Optoelect Sci, Chilung 202, Taiwan
[2] Natl Taiwan Univ, Dept Chem, Taipei 106, Taiwan
来源：
JOURNAL OF MATERIALS CHEMISTRY | 2010年 / 20卷 / 45期
关键词：
LIGHT-EMITTING-DIODES; HOST MATERIALS; CARBAZOLE DERIVATIVES; FLUORESCENT BLUE; TRIPLET EXCITONS; SINGLE-LAYER; CORE;
D O I：
10.1039/c0jm02143a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The bipolar molecule CPhBzIm exhibits an excellent solid state photoluminescence quantum yield (Phi(PL) = 69%), triplet energy (E-T = 2.48 eV), and bipolar charge transport ability (mu(h) approximate to mu(e) approximate to 10(-6)-10(-5) cm(2) V-1 s(-1)). We have used it to fabricate a non-doped deep-blue organic light emitting diode (OLED) exhibiting promising performance [eta(ext) = 3%; CIE = (0.16, 0.05)] and to serve as host material for a yellow-green phosphorescent OLED [eta(ext) = 19.2%; CIE = (0.42, 0.56)]. Exploiting these dual roles, we used CPhBzIm in a simple singly doped, two-color-based white OLED (eta(ext) = 7%; CIE = 0.31, 0.33).
引用
收藏
页码：10113 / 10119
页数：7
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