Novel D-A-π-A carbazole dyes containing benzothiadiazole chromophores for dye-sensitized solar cells

被引：48
作者：
Han, Liang [1 ]
Zu, Xiaoyan [1 ]
Cui, Yanhong [1 ]
Wu, Huabiao [1 ]
Ye, Qing [1 ]
Gao, Jianrong [1 ]
机构：
[1] Zhejiang Univ Technol, Coll Chem Engn & Mat Sci, Hangzhou 310032, Zhejiang, Peoples R China
来源：
ORGANIC ELECTRONICS | 2014年 / 15卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Carbazole; Sensitizing dyes; Solar cell; Benzothiadiazole; Synthesis; Benzene bridge; FREE ORGANIC-DYES; COUMARIN DYES; IMPEDANCE; DESIGN; MOIETY;
D O I：
10.1016/j.orgel.2014.04.016
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
New D-A-pi-A carbazole dyes containing benzothiadiazole chromophores were designed and synthesized for application in dye-sensitized solar cells (DSSCs). The light-harvesting capabilities and photovoltaic performance of these dyes were investigated systematically through comparison of different pi-bridges and acceptors. Compared with thiophene bridge, benzene bridge provides improved IPCE and V-OC, which leads to better photoelectricity conversion efficiency. Dyes with cyanoacetic acid acceptor display superior photovoltaic properties though with shorter absorption maximum and lower molar absorption coefficient compared with dyes with rhodanine acetic acid acceptor. Therefore, dye with benzene bridge and cyanoacetic acid acceptor shows the most efficient photoelectricity conversion efficiency and has the maximum eta value of 5.40% (V-OC = 710 mV, J(SC) = 10.99 - mA/cm(2), and ff = 0.71) under simulated AM 1.5 irradiation (100 mW/cm(2)). (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：1536 / 1544
页数：9
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