Bipolar fluorene-cored derivatives containing carbazole-benzothiazole hybrids as non-doped emitters for deep-blue electroluminescence

被引：11

作者：

Zhang, Ting ^{[1
]}

Cheng, Xiaojie ^{[1
]}

Wang, Xuchun ^{[1
]}

Song, Changchun ^{[1
]}

机构：

[1] Anhui Sci & Technol Univ, Sch Chem & Mat Engn, Fengyang 233100, Anhui, Peoples R China

来源：

OPTICAL MATERIALS | 2019年 / 89卷

关键词：

Non-doped OLEDs; Deep-blue; Fluorene-cored derivatives; Carbazole; Benzothiazole; LIGHT-EMITTING-DIODES; EFFICIENT BLUE; HIGHLY EFFICIENT; HOST MATERIALS; PHOSPHORESCENT; FLUORESCENCE; VERSATILE;

D O I：

10.1016/j.optmat.2019.01.067

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two bipolar fluorene-cored derivatives, namely BFCz and BFPCz, containing electron-transporting benzothiazole and hole-transporting carbazole moieties, are synthesized utilizing the Suzuki C-C coupling reactions, and characterized by NMR, MS and elemental analysis. These compounds possess good thermal stability with decomposition temperature up to 400 degrees C, and strong deep-blue emission in solution with excellent fluorescent quantum yield of over 70%. They also show high HOMO energy levels of - 5.44 eV and - 5.57 eV for effective hole injection and transportation from hole-transporting layer to the emitting layer. The non-doped OLEDs using these fluorene-cored derivatives as emitters by means of vacuum deposition process emit pure deep-blue electroluminescence with CIE coordinates of y <= 0.15, achieving maximum luminance efficiencies of 2.59 cd A(-1) for BFCz, 2.87 cd A(-1) for BFPCz.

引用

页码：498 / 504

页数：7