Monolithic route to efficient dye-sensitized solar cells employing diblock copolymers for mesoporous TiO 2
Orilall, M. Christopher
Crossland, Edward J. W.
Warren, Scott C.
Laity, Pete R.
Snaith, Henry J.
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AbstractWe present a material and device based study on the fabrication of mesoporous TiO2 and its integration into dye-sensitized solar cells. Poly(isoprene-block-ethyleneoxide) (PI-b-PEO) copolymers were used as structure directing agents for the sol-gel based synthesis of nanoporous monolithic TiO2 which was subsequently ground down to small particles and processed into a paste. The TiO2 synthesis and the formation of tens of micrometre thick films from the paste is a scalable approach for the manufacture of dye sensitised solar cells (DSCs). In this study, we followed the self-assembly of the material through the various processing stages of DSC manufacture. Since this approach enables high annealing temperatures while maintaining porosity, excellent crystallinity was achieved. Internal TiO 2 structures ranging from the nanometre to micrometre scale combine a high internal surface area with the strong scattering of light, which results in high light absorption and an excellent full-sun power conversion efficiency of up to 6.4% in a robust, 3 μm thick dye-sensitized solar cell. © 2010 The Royal Society of Chemistry.
CitationNedelcu M, Guldin S, Orilall MC, Lee J, Hüttner S, et al. (2010) Monolithic route to efficient dye-sensitized solar cells employing diblock copolymers for mesoporous TiO 2 . J Mater Chem 20: 1261–1268. Available: http://dx.doi.org/10.1039/b920077k.
SponsorsM.N., S. H., and U. S. acknowledge the European RTN-6 Network "Polyfilm" and S. H. acknowledges a scholarship of the Bayerische Graduiertenforderung. C. D. acknowledges the Royal Society for Funding. This work was funded in part by the EPSRC Nanotechnology Grand Challenges: Energy grant (EP/F056702/1), the Department of Energy (DE-FG02 87ER45298) through the Cornell Fuel Cell Institute (CFCI), the National Science Foundation (DMR-0605856), and the Cornell Universiy KAUST Center for Research and Education. The sabbatical leaves of U. W. was supported by the Leverhulme Trust and EPSRC. We thank Mathias Kolle for help with Fig. 1 and Richard Friend for valuable discussions and support.
PublisherRoyal Society of Chemistry (RSC)
JournalJ. Mater. Chem.