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Nanomaterials 2016, 6(11), 191; doi:10.3390/nano6110191

Influence of Quantum Dot Concentration on Carrier Transport in ZnO:TiO2 Nano-Hybrid Photoanodes for Quantum Dot-Sensitized Solar Cells

Department of Physics and Astronomy, University of Wyoming, Laramie, WY 82071, USA
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Author to whom correspondence should be addressed.
Academic Editor: Nimai Mishra
Received: 15 July 2016 / Revised: 13 October 2016 / Accepted: 14 October 2016 / Published: 25 October 2016
(This article belongs to the Special Issue Semiconductor Core/Shell Nanocrystals for Optoelectronic Applications)
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Abstract

Zinc oxide nanowire and titanium dioxide nanoparticle (ZnO:TiO2 NW/NP) hybrid films were utilized as the photoanode layer in quantum dot-sensitized solar cells (QDSSCs). CdSe quantum dots (QDs) with a ZnS passivation layer were deposited on the ZnO:TiO2 NW/NP layer as a photosensitizer by successive ion layer adsorption and reaction (SILAR). Cells were fabricated using a solid-state polymer electrolyte and intensity-modulated photovoltage and photocurrent spectroscopy (IMVS/PS) was carried out to study the electron transport properties of the cell. Increasing the SILAR coating number enhanced the total charge collection efficiency of the cell. The electron transport time constant and diffusion length were found to decrease as more QD layers were added. View Full-Text
Keywords: quantum dot sensitized solar cell; carrier transport; intensity modulated photovoltage spectroscopy quantum dot sensitized solar cell; carrier transport; intensity modulated photovoltage spectroscopy
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Maloney, F.S.; Poudyal, U.; Chen, W.; Wang, W. Influence of Quantum Dot Concentration on Carrier Transport in ZnO:TiO2 Nano-Hybrid Photoanodes for Quantum Dot-Sensitized Solar Cells. Nanomaterials 2016, 6, 191.

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