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Issue 19, 2013
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Heterogeneous junction engineering on core–shell nanocatalysts boosts the dye-sensitized solar cell

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Abstract

In this study, we successfully manipulate the heterogeneous junction at Co3O4–Pt core–shell cathodic nanocatalysts (C/P CNCs) by controlling the core/shell ratios. Our results indicate the cobalt core atoms would inject their valence charge to the surface Pt atoms due to the presence of extensive lattice strain in the shell region. This charge injection accelerates the redox kinetics at the catalysts surface. Consequently, compared with that using Pt nanoparticle cathode, the C/P CNCs at an optimal Pt/Co atomic ratio of 1, improves the current density and the photovoltaic efficiency of dye-sensitized soar cell (DSSC) by ∼36.3% and ∼22.9%, respectively. By combining structure and electrochemical analysis, we systematically elucidate the effects of Pt/Co (shell/core) ratios, the interplay of Co atoms on the shell structures, and the redox activity of C/P CNCs on the DSSC performance. Hereby, this study provide mechanistic insights in developing electrocatalysts for DSSC with programmable performance and reduced Pt utilization.

Graphical abstract: Heterogeneous junction engineering on core–shell nanocatalysts boosts the dye-sensitized solar cell

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Publication details

The article was received on 27 Apr 2013, accepted on 17 Jul 2013 and first published on 19 Jul 2013


Article type: Paper
DOI: 10.1039/C3NR02107F
Citation: Nanoscale, 2013,5, 9181-9192
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    Heterogeneous junction engineering on core–shell nanocatalysts boosts the dye-sensitized solar cell

    C. Wu, Y. Liu, P. Huang, T. Mark Luo, C. Lee, Y. Yang, T. Wen, T. Chen and T. Lin, Nanoscale, 2013, 5, 9181
    DOI: 10.1039/C3NR02107F

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