Application of the organic photosensitizers bearing two carboxylic acid groups to dye-sensitized solar cells

作者：Zhang Xue Hua^*; Yao Yi Shan; Li Chao; Wang Wei Bo; Cheng Xue Xin; Wang Xue Song; Zhang Bao Wen

来源：Chinese Journal of Chemistry, 2008, 26(5): 929-934.

DOI：10.1002/cjoc.200890170

• dye-sensitized solar cell
• organic sensitizer
• triphenylamine
• rhodanine-3-acetic acid

Three electron donor-pi bridge-electron acceptor (D-pi-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 (J(sc)) of 12.63 mA.cm(-2), an open circuit voltage (V(oc)) of 0.55 V, a fill factor (FF) of 0.62, corresponding to an overall efficiency (eta) of 5.9%.

• 出版日期2008-5
• 单位中国科学院理化技术研究所