On fundamental mechanisms in dye sensitized solar cells through the behaviour of different mesoporous titanium dioxide filmsReport as inadecuate




On fundamental mechanisms in dye sensitized solar cells through the behaviour of different mesoporous titanium dioxide films - Download this document for free, or read online. Document in PDF available to download.

1 IMRE IMRE - Institute for Science & Technology of Materials 2 Physics Faculty, University of Havana 3 IEM - Institut Européen des membranes 4 University of Setif 5 MIPA - Mathématiques, Informatique, Physique, et Applications - Université de Nîmes

Abstract : 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 nanoparticles in one case and polystyrene latex in another. Mesoporous mixed TiO2-SiO2 thin layers were also analyzed. The diverse morphology 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 TiO 2 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 TiO 2 nanograins, affecting photoelectrodes efficiency.

Keywords : Solar Cells Mesoporous films Nanocrystalline Materials Titanium Oxide





Author: Lidice Vaillant Roca - Elena Vigil - Fresnel Forcade - Thierry Thami - Hania Adnani - Christelle Yacou - André Ayral - Pierre Sa

Source: https://hal.archives-ouvertes.fr/



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