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Impedance spectroscopy study of solid-state dye-sensitized solar cells with varying Spiro-OMeTAD concentration

Published online by Cambridge University Press:  31 January 2011

Márcio S Góes
Affiliation:
marciosgoes@gmail.com, Universidade Estadual Paulista, Araraquara, Brazil
Francisco Fabregat-Santiago
Affiliation:
fabresan@fca.uji.es, Universitat Jaume I, Castelló, Spain
Paulo R Bueno
Affiliation:
prbueno@iq.unesp.br, Universidade Estadual Paulista, Araraquara, Brazil
Juan Bisquert
Affiliation:
bisquert@fca.uji.es
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Abstract

This work reports on the changes of solid-state cells dye-sensitized solar cells performance with the variation of concentration of spiro-OMeTAD between 5% and 25% in the fabrication of the cell. The changes in charge recombination and capacitance correlate with the improvement of current-potential characteristics a increasing spiro-OMeTAD content, which is explained by reduction of transport resistance for hole transport, the increase of charge separation in the dye molecules, and importantly, with the increase of the β-factor in the recombination resistance, that causes a reduction of the diode ideality factor.

Type
Research Article
Copyright
Copyright © Materials Research Society 2010

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