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Issue 24, 2017
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Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells

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Abstract

Anatase TiO2 nanowire (NW) films modified with inverted type-I CdS/CdSe core/shell structure QDs have been successfully prepared by the post synthesis ligand-assisted technique. Surface photovoltage (SPV), transient photovoltage (TPV) and transient photocurrent (TPC) measurements demonstrate that CdS/CdSe core/shell structure QD-sensitized TiO2 NWs electrodes favor photoexicited electron injection and charge transfer due to the special photo-electronic features of CdS/CdSe core/shell structure QDs. With a polysulfide electrolyte, the maximum conversion efficiency was 2.18% for CdS/CdSe QDs with the CdSe shell being 4.4 nanometers thick; a PCE of 0.07% for CdS QDs and a PCE of 0.63% for CdSe QDs were obtained under illumination at 100 mW cm−2. The results reveal that the CdS/CdSe core/shell structure QDs sensitized TiO2 NW electrodes have promising applications in solar cells.

Graphical abstract: Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells

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Publication details

The article was received on 12 Apr 2017, accepted on 23 May 2017 and first published on 23 May 2017


Article type: Paper
DOI: 10.1039/C7CP02358H
Citation: Phys. Chem. Chem. Phys., 2017,19, 15724-15733
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    Photoelectrical properties of CdS/CdSe core/shell QDs modified anatase TiO2 nanowires and their application for solar cells

    Q. Qiu, P. Wang, L. Xu, D. Wang, Y. Lin and T. Xie, Phys. Chem. Chem. Phys., 2017, 19, 15724
    DOI: 10.1039/C7CP02358H

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