Improved conductivity in dye-sensitised solar cells through block-copolymer confined TiO2 crystallisation

Guldin, S. et al. (2011) Improved conductivity in dye-sensitised solar cells through block-copolymer confined TiO2 crystallisation. Energy and Environmental Science, 4(1), pp. 225-233. (doi: 10.1039/C0EE00362J)

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Anatase TiO2 is typically a central component in high performance dye-sensitised solar cells (DSCs). This study demonstrates the benefits of high temperature synthesised mesoporous titania for the performance of solid-state DSCs. In contrast to earlier methods, the high temperature stability of mesoporous titania is enabled by the self-assembly of the amphiphilic block copolymer polyisoprene-block-polyethylene oxide (PI-b -PEO) which compartmentalises TiO2 crystallisation, preventing the collapse of porosity at temperatures up to 700 °C. The systematic study of the temperature dependence on DSC performance reveals a parameter trade-off: high temperature annealed anatase consisted of larger crystallites and had a higher conductivity, but this came at the expense of a reduced specific surface area. While the reduction in specific surface areas was found to be detrimental for liquid-electrolyte DSC performance, solid-state DSCs benefitted from the increased anatase conductivity and exhibited a performance increase by a factor of three.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Docampo, Dr Pablo
Authors: Guldin, S., Hüttner, S., Tiwana, P., Orilall, M. C., Ülgüt, B., Stefik, M., Docampo, P., Kolle, M., Divitini, G., Ducati, C., Redfern, S. A. T., Snaith, H. J., Wiesner, U., Eder, D., and Steiner, U.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Energy and Environmental Science
Publisher:Royal Society of Chemistry
ISSN (Online):1754-5706
Published Online:20 October 2010

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