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Issue 32, 2012
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CVD-grown TiO2 particles as light scattering structures in dye-sensitized solar cells

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Abstract

Chemical vapour deposition (CVD) at atmospheric pressure, using TiCl4 as a precursor, was used to grow nanostructured TiO2 films on glass substrates. At relatively low temperatures (∼245 °C) and using relatively high reactant concentrations, different nano-morphologies of TiO2 were formed simultaneously, such as spheres, nanowires and mesoporous structures. The TiO2 spheres were successfully applied as light-scattering particles in dye-sensitized solar cells, either by direct deposition onto electrodes in the reactor, or by preparation of a printing paste from the deposited particles. For dye-sensitized solar cells using the organic dye D35 as sensitizer and a cobalt-complex based redox electrolyte, a solar cell efficiency of 4.4% was obtained using a 5 μm transparent mesoporous TiO2 layer. Addition of a 5 μm light-scattering CVD-particle film increased the efficiency by 22% to 5.4%, which was similar to the result obtained with an equally thick commercially available light-scattering film (5.3%). Longer electron lifetime was found using CVD-based films, which is attributed to the presence of more traps in the bulk of the material.

Graphical abstract: CVD-grown TiO2 particles as light scattering structures in dye-sensitized solar cells

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Article information


Submitted
04 Jul 2012
Accepted
09 Oct 2012
First published
09 Oct 2012

RSC Adv., 2012,2, 12278-12285
Article type
Paper

CVD-grown TiO2 particles as light scattering structures in dye-sensitized solar cells

M. Pazoki, N. Taghavinia, Y. Abdi, F. Tajabadi, G. Boschloo and A. Hagfeldt, RSC Adv., 2012, 2, 12278
DOI: 10.1039/C2RA21361C

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