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

Guldin, Stefan and Hüttner, Sven and Tiwana, Priti and Orilall, M. Christopher and Ülgüt, Burak and Stefik, Morgan and Docampo, Pablo and Kolle, Matthias and Divitini, Giorgio and Ducati, Caterina and Redfern, Simon A. T. and Snaith, Henry J. and Wiesner, Ulrich and Eder, Dominik and Steiner, Ullrich (2011) Improved conductivity in dye-sensitised solar cells through block-copolymer confined TiO2 crystallisation. Energy & Environmental Science, 4 (1). p. 225. ISSN 1754-5692 DOI

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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: Article
Uncontrolled Keywords: 2010AREP; IA62;
Subjects: 03 - Mineral Sciences
Divisions: 03 - Mineral Sciences
Journal or Publication Title: Energy & Environmental Science
Volume: 4
Page Range: p. 225
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 12 Aug 2011 16:37
Last Modified: 23 Jul 2013 10:02

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