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Photoelectrochemical properties of MWCNT-TiO2 hybrid materials as a counter electrode for dye-sensitized solar cells

Yu-Qiao Wang ,  Xue-Ling Gao ,  Bo Song ,  Yun-Liang Gu ,  Yue-Ming Sun

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Citation:  Yu-Qiao Wang, Xue-Ling Gao, Bo Song, Yun-Liang Gu, Yue-Ming Sun. Photoelectrochemical properties of MWCNT-TiO2 hybrid materials as a counter electrode for dye-sensitized solar cells[J]. Chinese Chemical Letters, 2014, 25(4): 491-495. doi: 10.1016/j.cclet.2014.01.003 shu

Photoelectrochemical properties of MWCNT-TiO2 hybrid materials as a counter electrode for dye-sensitized solar cells

    • 通讯作者: Yu-Qiao Wang,
    Yue-Ming Sun,
  • 基金项目:

    We are grateful for the grants from the National Natural Science Foundation of China (No. 21173042) (No. 21173042)

    National Basic Research Program of China (No. 2013CB932902) (No. 2013CB932902)

    Fundamental Research Funds for the Central Universities (No. 3207043401) (No. 3207043401)

    Science & Technology Support Project of Jiangsu (No. BE2013118) (No. BE2013118)

    Jiangsu Key Laboratory of Environmental Material & Environmental Engineering (No. JHCG201012). (No. JHCG201012)

摘要: The MWCNT-TiO2 hybrid materials were prepared by a simply mixing method and used as a counter electrode (CE) for dye-sensitized solar cells. Compared with the platinum CE, MWCNT-TiO2 CE has the similar redox voltage and current response in the cyclic voltammetry. The electrochemical catalytic activity was characterized by the electrochemical impedance spectroscopy and Tafel curve, including the equivalent circuit, the exchange current density, the limiting diffusion current density, and the diffusion coefficient of triiodide/iodide redox species. The results indicate that the reduction process from triiodide to iodide is determined by the kinetic-controlled and diffusion-limited processes. The device performance is optimal based on the MWCNT-TiO2 (mass ratio of 2:1) CE, such as the open-circuit voltage of 0.72 V, the short-circuit photocurrent density of 15.71 mA/cm2, the fill factor of 0.68, and the photon-to-electron conversion efficiency of 7.69%.

English

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  • 发布日期:  2014-01-09
  • 收稿日期:  2013-10-24
  • 网络出版日期:  2013-12-26
通讯作者: 陈斌, bchen63@163.com
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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