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Issue 7, 2016
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Metal-based bracken-like single-sided dye-sensitized solar cells with horizontal separation

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Abstract

One of the drawbacks of typical dye-sensitized solar cells (DSCs) is their high cost and the high electrical resistance of the transparent conducting substrate. In conventional sandwich-type DSCs, only one of the FTO substrates can be replaced by a metal substrate. We investigated an all-metal-electrode single-sided DSC in which interpenetrated bracken-like Cr electrodes were created using photolithography; mesoporous TiO2 and Pt films were deposited on the laterally separated electrodes. Thermal Pt deposition and electrodeposition methods were investigated and it was found that a cyclic electrodeposition method resulted in selective Pt deposition at room temperature with a higher device performance. Cu or ZnO sacrificial layers and TiO2 or TiO2/SiO2 porous layers were used for the spacer layer that keeps the Pt electrode away from the TiO2 mesoporous layer and the optimum results were obtained when a TiO2/SiO2 layer was used. The best device had a current density of 8.47 mA cm−2, an open circuit voltage of 0.685 V and an efficiency of 2.44%. The results of open circuit voltage decay and electrochemical impedance spectrometry showed the formation of a high-resistivity blocking layer, which was attributed to the Cr oxide formed during thermal treatment. The efficiency may be improved further by developing low-temperature fabrication processes.

Graphical abstract: Metal-based bracken-like single-sided dye-sensitized solar cells with horizontal separation

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Supplementary files

Article information


Submitted
13 Nov 2015
Accepted
30 Dec 2015
First published
07 Jan 2016

Phys. Chem. Chem. Phys., 2016,18, 5244-5252
Article type
Paper
Author version available

Metal-based bracken-like single-sided dye-sensitized solar cells with horizontal separation

F. Behrouznejad, N. Taghavinia, M. Pazoki and F. Tajabadi, Phys. Chem. Chem. Phys., 2016, 18, 5244
DOI: 10.1039/C5CP06974B

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