Perera , V. P. S and Pitigala , P. K. D. D. P and Jayaweera , P. V. V. and Bandaranayake , K. M. P and Tennakone , K. (2003) Dye-sensitized Solid-state Photovoltaic Cells Based on Dye-multilayer Semiconductor Nanostructures. J. Phys. Chem. B, 107 (50). pp. 13758-13761.
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Official URL: http://pubs.acs.org/doi/abs/10.1021/jp0348979
The efficiency of dye-sensitized solar cells may be further improved if ways are found to broaden the spectral response resolving the fundamental issues involved. Here we report construction of dye-sensitized solid-state photovoltaic cells with heterostructure configurations:  n-TiO2/D1/p-CuSCN,  n-TiO2/p-CuSCN/D2/ p-CuSCN and  n-TiO2/D1/p-CuSCN/D2/p-CuSCN, where n-TiO2 is a 10 μm thick nanocrystalline film of titanium dioxide, p-CuSCN and p-CuSCN are thin ( 2 nm) and thick ( 10 μm) films of copper(I) thiocyanate. Monolayers of the dyes D1 (Fast Green) and D2 (Acridine Yellow) are coated on TiO2 and p-CuSCN, respectively. The cell of configuration  delivered the highest efficiency, open-circuit voltage, and short-circuit photocurrent as it effectively utilizes the light adsorbed by D1 and D2. The mechanism of operation involves tunneling of energetic electrons and holes liberated in photoexcitations of dyes through a thin barrier of p-CuSCN. The strategy adopted indicates the possibility of designing more efficient dye-sensitized solar cells, widening the spectral response.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
|Divisions:||Faculty of Engineering, Science and Mathematics > School of Physics|
Faculty of Engineering, Science and Mathematics > School of Chemistry
|Deposited On:||28 Oct 2009 05:21|
|Last Modified:||28 Oct 2009 05:21|
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