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Issue 43, 2015
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Transition metal selenides as efficient counter-electrode materials for dye-sensitized solar cells

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Abstract

Exploiting an alternative of the Pt-based counter-electrode materials for the triiodide reduction reaction has become a major interest in the fundamental research of dye-sensitized solar cells. Transition-metal selenides have recently been demonstrated as promising non-precious metal electrocatalysts for the triiodide reduction reaction. Herein, we prepared a series of transition-metal selenides via a free-reductant solvothermal method and used them as counter-electrodes in high efficiency dye-sensitized solar cells. The electrochemical results showed that these selenides had excellent catalytic activity for the reduction of the triiodine/iodine couple, and except for MoSe2, the conversion efficiencies of the corresponding dye-sensitized solar cells were comparable to the sputtered Pt counter-electrode. Theoretical investigation clearly revealed that the unsatisfactory performance of MoSe2 mainly originated from the processes of adsorption and charge-transfer. These findings can help to better understand the electrocatalytic processes and thus offer some useful guidelines to develop more efficient electrochemical catalysts.

Graphical abstract: Transition metal selenides as efficient counter-electrode materials for dye-sensitized solar cells

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Publication details

The article was received on 15 Aug 2015, accepted on 24 Sep 2015 and first published on 25 Sep 2015


Article type: Paper
DOI: 10.1039/C5CP04862A
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Citation: Phys. Chem. Chem. Phys., 2015,17, 28985-28992
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    Transition metal selenides as efficient counter-electrode materials for dye-sensitized solar cells

    J. Guo, S. Liang, Y. Shi, C. Hao, X. Wang and T. Ma, Phys. Chem. Chem. Phys., 2015, 17, 28985
    DOI: 10.1039/C5CP04862A

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