TiO2 nanoparticle/nanotube multilayer composite film as photoanode applied in dye sensitised solar cells

Abstract

This paper reports a layer by layer formation of a multilayer composite film and its application in dye sensitised solar cells (DSSCs). Each layer of the multilayer composite film was deposited by doctor blade technology. This structure is developed from the composite film and the sandwiched film of our previous reports. The light absorption behaviours and photocurrent–voltage curves (J–V curves) of all the three-type films were investigated. J–V curves demonstrate that the multilayer composite film based DSSC shows more excellent photovoltaic performance than those of the previous two kinds of structure, which is due to its exerting double advantages of better light scattering property and higher electron transport efficiency. Light absorption curves reveal stronger light absorption performance of the multilayer composite film than the single layer composite film and the sandwiched film, which indicates better utilisation of light scattering effects in multilayer composite film.