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Issue 37, 2014
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Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires

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Abstract

Uniform zinc oxide (ZnO) nanosheet arrays were grown on woven titanium wires using a low temperature hydrothermal method. Photoanodes were prepared by depositing CdS and CdSe quantum dots onto the ZnO nanosheet arrays by a successive ionic layer adsorption and reaction (SILAR) method. Solar cells were assembled using these nanostructured photoanodes and their photovoltaic performance was characterized. The effect of using SILAR cycles for the deposition of quantum dots on the performance of these nanostructured solar cells was investigated systematically. The overall light-to-electricity conversion efficiency of 0.98% was achieved under 100 mW cm−2 illumination for flexible CdS/CdSe co-sensitized solar cells using conventional Pt foils as counter electrodes. To further improve the performance of the flexible solar cells, PbS and Cu2S counter electrodes based on Pb and Cu foils were fabricated. The best conversion efficiencies of flexible CdS/CdSe co-sensitized solar cells using Cu2S and PbS counter electrodes were 3.4% and 2.5%, which demonstrated a significant enhancement in values for short circuit current, open circuit voltage, and fill factor compared to those obtained with the commonly used Pt and Au electrodes.

Graphical abstract: Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires

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Publication details

The article was received on 24 Jun 2014, accepted on 28 Jul 2014 and first published on 29 Jul 2014


Article type: Paper
DOI: 10.1039/C4TA03212H
J. Mater. Chem. A, 2014,2, 15546-15552

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    Flexible quantum dot-sensitized solar cells with improved efficiencies based on woven titanium wires

    Y. Li, L. Wei, C. Wu, C. Liu, Y. Chen, H. Liu, J. Jiao and L. Mei, J. Mater. Chem. A, 2014, 2, 15546
    DOI: 10.1039/C4TA03212H

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