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In-Situ Grown Cobalt Selenide/Graphene Nanocomposites Counter Electrode for Enhanced Dye-sensitized Solar Cell Performance

Abstract

Graphene nanocomposites were prepared by in-situ hydrothermally growing CoSe nanoparticles on different amounts of graphene nanosheets (GN). The influence of graphene content on the physical and electrochemical properties of CoSe was studied. The CoSe nanoparticles with high catalytic activity accelerated the reduction of triiodide, while the graphene facilitated the charge transport during the catalytic process. The CoSe/GN0.50 displayed the highest catalytic activity due to its lowest charge transfer resistance. With increasing the graphene content beyond the optimum concentration, restacking of graphene caused a decreased electrocatalytic activity of CoSe/GN nanohybrids. The DSSCs fabricated with CoSe/GN0.50 as CE exhibited 28% of improvement in the photo-conversion efficiency (PCE) with respect to the standard Pt, much higher than other reported binary metal selenides. It revealed that CoSe/GN0.50nanohybrids could be used as a promising alternative to platinum counter electrode for DSSC.

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Publication details

The article was received on 29 Jan 2017, accepted on 07 Jun 2017 and first published on 08 Jun 2017


Article type: Paper
DOI: 10.1039/C7TA00941K
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
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    In-Situ Grown Cobalt Selenide/Graphene Nanocomposites Counter Electrode for Enhanced Dye-sensitized Solar Cell Performance

    V. Murugadoss, N. Wang, S. Tadakamalla, B. Wang, Z. Guo and S. Angaiah, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA00941K

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