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Issue 35, 2013
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Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells

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Abstract

TiO2 compact layers (CLs) prepared by electrophoretic deposition (EPD) from an aqueous nanoparticle suspension were used in dye-sensitized solar cells (DSSCs) to prevent charge recombination at the interface between the transparent fluorine-doped tin oxide (FTO) substrate and the electrolyte. The TiO2 nanopowder (ca. 4.5 nm diameter) suspension used in the EPD process was prepared via a continuous hydrothermal flow synthesis pilot plant (at a production rate of ca. 0.38 kg h−1). The optimal thickness of the TiO2 CL for DSSCs is about 115 nm. Compared to the DSSCs without a CL, the optimal cell has shown improved short-circuit current density (JSC) and solar energy conversion efficiency by 13.1% and 15.0%, respectively. The mechanism for improved performance has been studied by the measurements of dark current and electrochemical impedance spectra. The interfacial charge transfer resistance at the FTO/electrolyte interface is increased after fabricating a CL in the cell, indicating inhibited electron recombination at the interface.

Graphical abstract: Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells

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Article information


Submitted
21 Apr 2013
Accepted
29 Jun 2013
First published
04 Jul 2013

Phys. Chem. Chem. Phys., 2013,15, 14729-14735
Article type
Paper

Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells

X. Li, Y. Qiu, S. Wang, S. Lu, R. I. Gruar, X. Zhang, J. A. Darr and T. He, Phys. Chem. Chem. Phys., 2013, 15, 14729
DOI: 10.1039/C3CP51705E

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