Issue 3, 2005
From the journal:

Journal of Materials Chemistry

Acid versus base peptization of mesoporous nanocrystalline TiO2 films: functional studies in dye sensitized solar cells†

Sarmimala Hore,*a   Emilio Palomares,bf   Herman Smit,c   Nicolaas J. Bakker,c   Pascal Comte,d   Paul Liska,d   K. Ravindranathan Thampi,d   Jan M. Kroon,c   Andreas Hinschae  and  James R. Durrant*b  

* Corresponding authors

a Freiburg Materials Research Center, Albert Ludwigs University, Stefan Meier Strasse 21, 79104 Freiburg, Germany
E-mail: hore@fmf.uni-freiburg.de

b Centre for Electronic Materials and Devices, Department of Chemistry, Imperial College, London SW7 2AY, U.K
E-mail: j.durrant@ic.ac.uk

c ECN Solar Energy, P.O. Box 1, 1755 ZG Petten, The Netherlands

d Laboratory for Photonics and Interfaces, Swiss Federal Institute of Technology, Lausanne (EPFL), CH 1015, Lausanne, Switzerland

e Fraunhofer Institute for Solar Energy Systems, Heidenhof Staße 2, 79110 Freiburg, Germany

f Institut de Ciencia Molecular (IcMol). Universitat de Valencia, 46100-Burjassot, Valencia, Spain

Abstract

We report an analysis of the influence of acid/base conditions employed in the synthesis of TiO2 nanoparticles upon the performance of dye sensitised photoelectrochemical solar cells fabricated from these particles. The functional properties of the TiO2 nanoparticles in these devices are investigated by potential step chronoamperometry, transient laser spectroscopy, and photovoltaic device characterisation. We find that base peptization conditions employed in the sol–gel fabrication of the TiO2 nanoparticles result in a reduction in film electron density under negative applied bias, correlated with slower interfacial recombination losses and a higher device open circuit voltage.

Graphical abstract: Acid versus base peptization of mesoporous nanocrystalline TiO2 films: functional studies in dye sensitized solar cells

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Article information

DOI
https://doi.org/10.1039/B407963A
Article type
Paper
Submitted
05 May 2004
Accepted
29 Sep 2004
First published
20 Oct 2004

J. Mater. Chem., 2005,15, 412-418

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Acid versus base peptization of mesoporous nanocrystalline TiO2 films: functional studies in dye sensitized solar cells

S. Hore, E. Palomares, H. Smit, N. J. Bakker, P. Comte, P. Liska, K. R. Thampi, J. M. Kroon, A. Hinsch and J. R. Durrant, J. Mater. Chem., 2005, 15, 412 DOI: 10.1039/B407963A

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