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Molecular design of organic dyes based on vinylene hexylthiophene bridge for dye-sensitized solar cells

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Abstract

Three donor-(π-spacer)-acceptor (D-π-A) organic dyes, containing different groups (triphenylamine, di(p-tolyl)phenylamine, and 9-octylcarbazole moieties) as electron donors, were designed and synthesized. Nanocrystalline TiO2 dye-sensitized solar cells were fabricated by using these dyes. It was found that the variation of electron donors in the D-π-A dyes played an important role in modifying and tuning photophysical properties of organic dyes. Under standard global AM 1.5 solar condition, the DSSC based on the dye D2 showed the best photovoltaic performance: a short-circuit photocurrent density (J sc ) of 13.93 mA/cm2, an open-circuit photovoltage (V oc ) of 0.71 V, and a fill factor (FF) of 0.679, corresponding to solar-to-electric power conversion efficiency (η) of 6.72%.

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Authors and Affiliations

  1. College of Chemistry and Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province, Xiangtan University, Xiangtan, 411105, China

    DaXi Liu, Bin Zhao, Ping Shen, Hui Huang & SongTing Tan

  2. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, Xiangtan University, Xiangtan, 411105, China

    Bin Zhao, LiMing Liu & SongTing Tan

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  1. DaXi Liu
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  2. Bin Zhao
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  3. Ping Shen
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  4. Hui Huang
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  5. LiMing Liu
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  6. SongTing Tan
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Correspondence to Bin Zhao.

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Supported by the Key Project of Hunan Province of China (Grant No. 2008FJ2004), Natural Science Foundation of Hunan Province of China (Grant Nos. 09JJ3020 & 09JJ4005), and Scientific Research Fund of Hunan Provincial Education Department (Grant No. 08C888).

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Liu, D., Zhao, B., Shen, P. et al. Molecular design of organic dyes based on vinylene hexylthiophene bridge for dye-sensitized solar cells. Sci. China Ser. B-Chem. 52, 1198–1209 (2009). https://doi.org/10.1007/s11426-009-0163-3

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  • DOI: https://doi.org/10.1007/s11426-009-0163-3

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