Small molecules with pyridine backbone modified with carbazole, fluorine and bromine for white light-emitting diode applications

被引：8

作者：

Wang, Ping ^{[1
]}

Fan, He-Liang ^{[1
]}

He, Yan-Bo ^{[1
]}

Huang, Hai-Fang ^{[1
]}

Zhu, Cai-Cai ^{[1
]}

Gao, Xi-Cun ^{[1
]}

Xu, Hong ^{[2
]}

Wei, Bin ^{[2
]}

机构：

[1] Nanchang Univ, Sch Sci, Dept Chem, Nanchang 330031, Peoples R China

[2] Shanghai Univ, Minist Educ, Key Lab Adv Display & Syst Applicat, Shanghai 200072, Peoples R China

来源：

DISPLAYS | 2013年 / 34卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Pyridine; Carbazole; Bromo; Excimer; Orange; White; AGGREGATION-INDUCED EMISSION; ORGANIC ELECTROLUMINESCENT DEVICES; HIGH-EFFICIENCY; FLUOROPHORES; COMPONENT; COMPLEX; LAYER; EXCITONS; BEHAVIOR;

D O I：

10.1016/j.displa.2013.06.002

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Seven compounds with pyridine as the backbone modified by carbazole moiety, bromine atom and fluorine atom were synthesized. Compounds 1, 2, 3 with bromo substitution at the 2-position and carbazole modification at the 5-position of pyridine emit not only a sharp blue singlet fluorescence but also a wide banded excimer-based orange emission. The two colors coming from a single molecule can be used to fabricate a simplified white light emitting device. The electroluminescence based on 1 and 2 exhibits white-light emission with CIE coordinates of x = 0.25 and y = 0.30 for 1 and x = 0.33 and y = 0.37 for 2 at high current densities, very close to pure white emission. In addition, the role of bromo-substitution at pyridine is concluded to be essential to generate molecular interaction thus an excimer emission. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：320 / 325

页数：6

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