Effect of different acceptors in di-anchoring triphenylamine dyes on the performance of dye-sensitized solar cells

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• 作者：Guohua Wu^a ; Fantai Kong^a ; ^{kongfantai@163.com" class="auth_mail} ; Yaohong Zhang^b ; Xianxi Zhang^c ; Jingzhe Li^a ; Wangchao Chen^a ; Changneng Zhang^a ; Songyuan Dai^d ; ^a ; ^{sydai@ipp.ac.cn" class="auth_mail}
• 关键词：Di-anchoring triphenylamine dye ; Dye-sensitized solar cells ; Organic sensitizer ; Photovoltaic performance ; Electrochemical impedance spectroscopy ; Electron acceptor
• 刊名：Dyes and Pigments
• 出版年：June, 2014
• 年：2014
• 卷：105
• 期：Complete
• 页码：1-6
• 全文大小：1251 K

文摘

Three di-anchoring triphenylamine dyes, which were coded as rong class="boldFont">TPAC1rong>, rong class="boldFont">TPAR2rong> and rong class="boldFont">TPACR2rong>, were designed and synthesized for dye-sensitized solar cell application. The structural modification effect of different anchoring groups on photophysical, electrochemical and photovoltaic properties of the related DSSCs was extensively investigated. With the variation from cyanoacetic acid via rhodanine-3-acetic acid to co-rhodanine units, the molar extinction coefficients of the maximum absorption wavelength for the three dyes gradually increase due to the extension of 蟺 system. In comparison with that for rong class="boldFont">TPAC1rong> and rong class="boldFont">TPAR2rong>, DSSC based on dye rong class="boldFont">TPACR2rong> with double co-rhodanine groups shows the best overall conversion efficiency of 4.64% with simultaneous enhancement of photocurrent and photovoltage, which is attributed to the higher molar extinction coefficient (6.5聽脳聽10⁴聽M^鈭?聽cm^鈭?), broader absorption spectra, broader IPCE spectra and longer electron lifetime.