Application of the Organic Photosensitizers Bearing Two Carboxylic Acid Groups to Dye‐Sensitized Solar Cells |
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Authors: | Xue‐Hua ZHANG Yi‐Shan YAO Chao LI Wei‐Bo WANG Xue‐Xin CHENG Xue‐Song WANG Bao‐Wen ZHANG |
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Affiliation: | 1. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100080, China;2. Tel.: 0086‐010‐82543592;3. Fax: 0086‐010‐62554670 |
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Abstract: | Three electron donor‐?? bridge‐electron acceptor (D‐π‐A) organic dyes bearing two carboxylic acid groups were applied to dye‐sensitized solar cells (DSSC) as sensitizers, in which one triphenylamine or modified triphenylamine and two rhodanine‐3‐acetic acid fragments act as D and A, respectively. It was found that the introduction of t‐butyl or methoxy group in the triphenylamine subunit could lead to more efficient photoinduced intramolecular charge transfer, thus improving the overall photoelectric conversion efficiency of the resultant DSSC. Under global AM 1.5 solar irradiation (73 mW·cm?2), the dye molecule based on methoxy‐substituted triphenylamine achieved the best photovoltaic performance: a short circuit photocurrent density (Jsc) of 12.63 mA·cm?2, an open circuit voltage (Voc) of 0.55 V, a fill factor (FF) of 0.62, corresponding to an overall efficiency (η) of 5.9%. |
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Keywords: | dye‐sensitized solar cell organic sensitizer triphenylamine rhodanine‐3‐acetic acid |
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