Influence of different acceptor groups in julolidine-based organic dye-sensitized solar cells

被引：43

作者：

Wu, Guohua ^{[1
]}

Kong, Fantai ^{[1
]}

Li, Jingzhe ^{[1
]}

Chen, Wangchao ^{[1
]}

Fang, Xiaqin ^{[1
]}

Zhang, Changneng ^{[1
]}

Chen, Qianqian ^{[2
]}

Zhang, Xianxi ^{[2
]}

Dai, Songyuan ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Key Lab Novel Thin Film Solar Cells, Hefei 230031, Anhui, Peoples R China

[2] Liaocheng Univ, Sch Chem & Chem Engn, Shandong Prov Key Lab Chem Energy Storage & Novel, Liaocheng 252059, Peoples R China

来源：

DYES AND PIGMENTS | 2013年 / 99卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Dye-sensitized; Solar cell; Julolidine; Organic sensitizer; Transient absorption spectra; Photovoltaic performance; CONVERSION-EFFICIENCY; ELECTRON INJECTION; INDOLINE DYES; COUMARIN DYES; RECOMBINATION; PERFORMANCE; DERIVATIVES;

D O I：

10.1016/j.dyepig.2013.06.023

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Two novel organic dyes containing julolidine as the electron donor and cyanoacetic acid or rhodanine-3-acetic acid as the electron acceptor bridged by bithiophene unit were synthesized. The absorption spectra, electrochemical and photovoltaic properties of the new dyes were extensively investigated. Transient absorption spectra measurements show that both sensitizers are quickly regenerated and the dye cations are efficiently intercepted by the redox mediator. The overall conversion efficiencies of 2.6% and 2.0% were obtained for dye-sensitized solar cells (DSSC) based on the cyanoacetic acid and rhodanine derived dyes, respectively. Compared with the rhodanine terminated dye, the open circuit voltage and the conversion efficiency of solar cell based on the cyanoacetic acid dye are increased about 25% and 30%, respectively. The lower efficiency of solar cell based on rhodanine is mainly resulted from the broken delocalization of the excited state due to the NCH2CO2H anchor, which affects the electron injection from the rhodanine terminated dye to the conduction band of TiO2. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：653 / 660

页数：8

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