Eur. Phys. J. Appl. Phys.
Volume 72, Number 2, November 2015
|Number of page(s)||8|
|Section||Nanomaterials and Nanotechnologies|
|Published online||06 November 2015|
On fundamental mechanisms in dye sensitized solar cells through the behaviour of different mesoporous titanium dioxide films
Enermat Division, Institute of Materials Science and Technology (IMRE) – Physics Faculty, University of Havana, Zapata esq G, s/n, 10400 Havana, Cuba
2 Physics Faculty, University of Havana, San Lázaro y L, 10400 Havana, Cuba
3 Institut Européen des Membranes, UMR 5635 CNRS, ENSCM, Université Montpellier II, CC047 Place Eugène, Bataillon, 34095 Montpellier Cédex 5, France
4 University Ferhat Abbhas, 19000 Sétif 1, Algeria
5 MIPA Laboratory, University of Nîmes, Dept. Sciences and Arts, CS 13019, 30021 Nîmes cedex 01, France
a e-mail: email@example.com
Revised: 20 October 2015
Accepted: 20 October 2015
Published online: 6 November 2015
Understanding mechanisms in DSSCs is fundamental for their improvement; this includes the nanocrystalline semiconducting layer behaviour. Different mesoporous TiO2 layers are fabricated and analyzed for possible use in DSSC solar cells. The preparations included the addition of P123 triblock copolymer as structuring agent to the synthesized anatase sol. This preparation was also mixed with Degussa P25 TiO2 nanoparticles in one case and polystyrene latex in another. Mesoporous mixed TiO2-SiO2 thin layers were also analyzed. The diverse morphologies and features are studied by microscopic techniques and by means of spectral quantum efficiency of a photoelectrochemical cell (PEC) that uses as photoelectrode the unsensitized porous TiO2 layer. Contact angle measurements are also performed. We have found that a very high specific area due to very small nanocrystals and small pores can hinder electrolyte penetration in the pores formed by TiO2 nanograins, affecting photoelectrodes efficiency.
© EDP Sciences, 2015
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