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Issue 15, 2014
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Transparent-conducting-oxide nanowire arrays for efficient photoelectrochemical energy conversion

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Abstract

We report one dimensional (1-D) transparent-conducting-oxide arrays coated with light-absorbing semiconductors to simultaneously maximize light harvesting and charge collection in a photoelectrochemical (PEC) system. Tin-doped indium oxide (ITO) nanowire (NW) arrays are prepared on ITO thin-film substrates as the transparent-conducting-oxide, and TiO2 or CdSe/CdS/TiO2 thin layers were coated on the ITO NW arrays as the solar light-absorbing layers. The optimal PEC performance, 0.85% under 100 mW cm−2 of light illumination, is obtained from ∼30 μm-long ITO NW, which is covered with ∼20 nm-thick TiO2 nanoshell. We finally demonstrate that the ITO NW-based photoelectrode is also compatible with one of the most efficient visible-light sensitizers, the CdS/CdSe quantum dot. Our approach using the transparent conducting 1-D array has wide potential to improve the PEC performances of conventional semiconducting materials through liberation from the poor charge transport.

Graphical abstract: Transparent-conducting-oxide nanowire arrays for efficient photoelectrochemical energy conversion

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Publication details

The article was received on 29 Apr 2014, accepted on 23 May 2014 and first published on 26 May 2014


Article type: Paper
DOI: 10.1039/C4NR02298J
Citation: Nanoscale, 2014,6, 8649-8655
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    Transparent-conducting-oxide nanowire arrays for efficient photoelectrochemical energy conversion

    S. Lee, S. Park, G. S. Han, D. H. Kim, J. H. Noh, I. S. Cho, H. S. Jung and K. S. Hong, Nanoscale, 2014, 6, 8649
    DOI: 10.1039/C4NR02298J

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