Block copolymer directed synthesis of mesoporous TiO2for dye-sensitized solar cells
- 7 November 2008
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Soft Matter
- Vol. 5 (1), 134-139
- https://doi.org/10.1039/b815166k
Abstract
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.Keywords
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