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Issue 10, 2014
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Efficient band alignment for ZnxCd1−xSe QD-sensitized TiO2 solar cells

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Abstract

ZnxCd1−xSe QDs sensitized TiO2 photoelectrodes on FTO substrates have been prepared using an ion-exchange route. The lattice parameters and band gaps of such ZnxCd1−xSe QDs were found to have linear and quadratic relationships with the Zn content (x). These TiO2/ZnxCd1−xSe films were further assembled to solar cells and demonstrated to be promising photoelectrodes for solar cells. In the fabricated QDs sensitized solar cells, QDs with the composition of x = 0.6 produced the highest photocurrent and photoconversion efficiency. It demonstrates that the effective band alignment of the QDs is favorable to enhance the photovoltaic performance for solar cells, by producing an efficient electron–hole separation following a band alignment.

Graphical abstract: Efficient band alignment for ZnxCd1−xSe QD-sensitized TiO2 solar cells

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Publication details

The article was received on 23 Oct 2013, accepted on 04 Dec 2013 and first published on 06 Dec 2013


Article type: Paper
DOI: 10.1039/C3TA14300G
J. Mater. Chem. A, 2014,2, 3669-3676

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    Efficient band alignment for ZnxCd1−xSe QD-sensitized TiO2 solar cells

    L. Yang, R. Zhou, J. Lan, Q. Zhang, G. Cao and J. Zhu, J. Mater. Chem. A, 2014, 2, 3669
    DOI: 10.1039/C3TA14300G

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