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

Title
Block copolymer directed synthesis of mesoporous TiO2 for dye-sensitized solar cells
Authors
Nedelcu, MihaelaLee, JinwooCrossland, Edward J. W.Warren, Scott C.Orilall, M. ChristopherGnull
Date Issued
Jan-2009
Publisher
ROYAL SOC CHEMISTRY
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 sp(2) 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
HOLE TRANSPORT; METAL-OXIDES; FILMS; EFFICIENCY; ELECTRON; POLYMERS; TITANIA
URI
http://oasis.postech.ac.kr/handle/2014.oak/29172
DOI
10.1039/B815166K
ISSN
1744-683X
Article Type
ARTICLE
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