2024-08-152024-08-152024-08-152018-08-15https://repositorio.ifal.edu.br/handle/123456789/611The world's energy supply is derived from the burning of fossil fuels, in particular oil, producing greenhouse gases, which causes damage to the ozone layer, in addition to changing the planet's temperature and to threatening life in general. Therefore it is necessary to use natural, renewable energy sources, such as solar energy for example. Brazilian Northeast has one of the highest rates of solar radiation in the country, which makes it feasible to use solar energy in this region. Thus, this work has the objective of presenting the formation of Dye Sensitized Solar Cells (DSSCs), with semiconductor films made of titania (TiO2) powders, templated by latex spheres. These films are sensitized by ruthenium dye complexes, which makes their use relatively applicable in the absorption of solar energy. It will be possible later to convert solar energy into electric energy through the photovoltaic effect. TiO2 powders used in this work were obtained from two latex bead molds: sedimented powders and solvent controlled evaporation films (ECS). The results show that TiO2 modeling by both molds was not efficient, because the film presented a compact surface, decreasing the porosity of titania film. This can lead to a non-anchoring of the dye sensitizer on the surface of the semiconductor film and also poor penetration of the redox pair therein and the final result is a low absorption of sun light by the film. Another factor to decrease titania sensitization was the presence of carbon in during densification process, since the carbon was not completely removed. Carbon makes a surface layer that competed with the sensitizing dye during its anchoring in semiconductor film and increased the recombination of electron-hole pair. It is concluded that topography of látex beads and the presence of carbon during calcination of TiO2 powders made it difficult to absorb light when sensitized, becoming a challenge its application in DSSCs. An alternative to solve this problem is the use of TiO2 powders when obtained through templates coated on microscope glass slides by ECS technique. This will ensure an efficient porosity of titania filmsAcesso AbertoQuímicaÓxido de TitâniaEsfera de látexModelagem químicaTitânia oxideLatex beadsChemical templateTrabalho de Conclusão de CursoCNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA