Band Gap Tunable, Donor-Acceptor-Donor Charge-Transfer Heteroquinoid-Based Chromophores: Near Infrared Photoluminescence and Electroluminescence

被引：380

作者：

Qian, Gang ^{[1
,2
]}

Dai, Bo ^{[1
,2
]}

Luo, Min ^{[1
,2
]}

Yu, Dengbin ^{[1
]}

Zhan, Jie ^{[1
,2
]}

Zhang, Zhiqiang ^{[1
]}

Ma, Dongge ^{[1
]}

Wang, Zhi Yuan ^{[1
,3
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

[2] Chinese Acad Sci, Grad Sch, Changchun 130022, Peoples R China

[3] Carleton Univ, Dept Chem, Ottawa, ON K1S 5B6, Canada

来源：

CHEMISTRY OF MATERIALS | 2008年 / 20卷 / 19期

基金：

加拿大自然科学与工程研究理事会;

关键词：

D O I：

10.1021/cm801911n

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：

A series of D-pi-A-pi-D type of near-infrared (NIR) fluorescent compounds based on benzobis(thia diazole) and its selenium analogues were synthesized and fully characterized by H-1 and C-13 NMR, high-resolution mass spectrometry, and elemental analysis. The absorption fluorescence, and electrochemical properties were also studied. Photoluminescence of these chromophores ranges from 900 to 1600 nm and their band gaps are between 1.19 and 0.56 eV. Replacing the sulfur by selenium can lead to a red shift for emission and reduce the band gaps further. Interestingly, compound 1 exhibits aggregation-induced emission enhancement effect in the solid state. All-organic light-emitting diodes based on M1 and M2 were made and exclusive NIR emissions above 1 mu m with external quantum efficiency of 0.05% and maximum radiance of 60 mW Sr-1 m(-2) were observed. The longest electroluminesence wavelength reaches 1115 nm.

引用

页码：6208 / 6216

页数：9

共 52 条

[1] Excited mixed-valence states of symmetrical donor-acceptor-donor π systems [J].