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    Evaluating the Critical Thickness of TiO 2 Layer on Insulating Mesoporous Templates for Efficient Current Collection in Dye-Sensitized Solar Cells

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    Type
    Article
    Authors
    Chandiran, Aravind Kumar
    Comte, Pascal
    Humphry-Baker, Robin
    Kessler, Florian
    Yi, Chenyi
    Nazeeruddin, Md. Khaja
    Grätzel, Michael
    KAUST Grant Number
    KUS-C1-015-21
    Date
    2013-01-15
    Online Publication Date
    2013-01-15
    Print Publication Date
    2013-06-06
    Permanent link to this record
    http://hdl.handle.net/10754/598241
    
    Metadata
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    Abstract
    In this paper, a way of utilizing thin and conformal overlayer of titanium dioxide on an insulating mesoporous template as a photoanode for dye-sensitized solar cells is presented. Different thicknesses of TiO2 ranging from 1 to 15 nm are deposited on the surface of the template by atomic layer deposition. This systematic study helps unraveling the minimum critical thickness of the TiO2 overlayer required to transport the photogenerated electrons efficiently. A merely 6-nm-thick TiO2 film on a 3-μm mesoporous insulating substrate is shown to transport 8 mA/cm 2 of photocurrent density along with ≈900 mV of open-circuit potential when using our standard donor-π-acceptor sensitizer and Co(bipyridine) redox mediator. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
    Citation
    Chandiran AK, Comte P, Humphry-Baker R, Kessler F, Yi C, et al. (2013) Evaluating the Critical Thickness of TiO 2 Layer on Insulating Mesoporous Templates for Efficient Current Collection in Dye-Sensitized Solar Cells . Advanced Functional Materials 23: 2775–2781. Available: http://dx.doi.org/10.1002/adfm.201202956.
    Sponsors
    The authors acknowledge the financial contribution from EU FP7 project "ORION" grant agreement number NMP-229036. This publication is partially based on work supported by the Center for Advanced Molecular Photovoltaics (Award No KUS-C1-015-21), made by King Abdullah University of Science and Technology (KAUST). A.K.C. is grateful for financial support from the Balzan foundation as part of the 2009 Balzan Prize award to M.G. M.K.N. thanks the World Class University program, Photovoltaic Materials, Department of Material Chemistry, Korea University, Chungnam, 339-700, Korea, funded by the Ministry of Education, Science and Technology through the National Research Foundation of Korea (No. R31-2008-000-10035-0).
    Publisher
    Wiley
    Journal
    Advanced Functional Materials
    DOI
    10.1002/adfm.201202956
    ae974a485f413a2113503eed53cd6c53
    10.1002/adfm.201202956
    Scopus Count
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