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Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells.
|Title||Electrophoretically deposited TiO2 compact layers using aqueous suspension for dye-sensitized solar cells.|
|Publication Type||Journal Article|
|Year of Publication||2013|
|Authors||Li X, Qiu Y, Wang S, Lu S, Gruar RI, Zhang X, Darr JA, He T|
|Journal||Physical chemistry chemical physics : PCCP|
|Date Published||2013 Sep 21|
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.
|Alternate Journal||Phys Chem Chem Phys|