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Issue 8, 2011
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Facile infiltration of semiconducting polymer into mesoporous electrodes for hybrid solar cells

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Abstract

Hybrid composites of semiconducting polymers and metal oxides are promising combinations for solar cells. However, forming a well-controlled nanostructure with bicontinuous interpenetrating networks throughout the photoactive film is difficult to achieve. Pre-structured “mesoporous” metal oxide electrodes can act as a well-defined template for latter polymer infiltration. However, the long range infiltration of polymer chains into contorted porous channels has appeared to elude the scientific community, limiting the advancement of this technology. Here we present a structural and electronic characterisation of poly(3-hexylthiophene) (P3HT) infiltrated into mesoporous dye-sensitized TiO2. Through a combination of techniques we achieve uniform pore filling of P3HT up to depths of over 4 μm, but the volumetric fraction of the pores filled with polymer is less than 24%. Despite this low pore-filling, exceptionally efficient charge collection is demonstrated, illustrating that pore filling is not the critical issue for mesoporous hybrid solar cells.

Graphical abstract: Facile infiltration of semiconducting polymer into mesoporous electrodes for hybrid solar cells

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Supplementary files

Article information


Submitted
06 Feb 2011
Accepted
09 May 2011
First published
20 Jun 2011

Energy Environ. Sci., 2011,4, 3051-3058
Article type
Paper

Facile infiltration of semiconducting polymer into mesoporous electrodes for hybrid solar cells

A. Abrusci, I. Ding, M. Al-Hashimi, T. Segal-Peretz, M. D. McGehee, M. Heeney, G. L. Frey and H. J. Snaith, Energy Environ. Sci., 2011, 4, 3051
DOI: 10.1039/C1EE01135A

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