Block copolymer directed synthesis of mesoporous TiO2 for dye-sensitized solar cells

Mihaela Nedelcu; Jinwoo Lee; Edward J. W. Crossland; Scott C. Warren; M. Christopher Orilall; Stefan Guldin; Sven Hüttner; Catarina Ducati; Dominik Eder; Ulrich Wiesner; Ullrich Steiner; Henry J. Snaith

doi:10.1039/B815166K

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Soft Matter

Issue 1, 2009

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Block copolymer directed synthesis of mesoporous TiO₂ for dye-sensitized solar cells

Mihaela Nedelcu , Jinwoo Lee , Edward J. W. Crossland , Scott C. Warren , M. Christopher Orilall , Stefan Guldin , Sven Hüttner , Catarina Ducati , Dominik Eder , Ulrich Wiesner , Ullrich Steiner and Henry J. Snaith

Soft Matter, 2009, 5, 134-139

DOI: 10.1039/B815166K
Received 30 Aug 2008, Accepted 14 Oct 2008
First published on the web 07 Nov 2008
This article is part of the collection: Five years on

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The morphology of TiO₂ plays an important role in the operation of solid-state dye-sensitized solar cells. By using polyisoprene-block-ethyleneoxide (PI-b-PEO) copolymers as structure directing agents for a sol-gel based synthesis of mesoporous TiO₂, we demonstrate a strategy for the detailed control of the semiconductor morphology on the 10 nm length scale. The careful adjustment of polymer molecular weight and titania precursor content is used to systematically vary the material structure and its influence upon solar cell performance is investigated. Furthermore, the use of a partially sp² hybridized structure directing polymer enables the crystallization of porous TiO₂ networks at high temperatures without pore collapse, improving its performance in solid-state dye-sensitized solar cells.

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Soft Matter

Block copolymer directed synthesis of mesoporous TiO₂ for dye-sensitized solar cells

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