Desenvolvimento de células solares fotossensibilizadas

Abstract

Environmental issues have driven research in alternative energy, especially concerning solar energy, since this energy source has a high potential and an expressive abundance. It is estimated that the Earth is irradiated daily by an amount of energy greater than the global daily consumption. However, without correspondence from the dominant photovoltaic sector in the market (Si-m and Si-p cells), the emerging cells (DSSC's; CSSPQ's; PSC's, among others) are introduced in an encouraging perspective, with very low cost of manufacture, in addition to a simple configuration. In this perspective, the present work was set out to develop photosensitized solar cells (emerging). In this work, plant dyes from Amazon Florest region were extracted, in addition, were synthetized quantum dots of CdS (PQ’s) and the most recent MAPbI3 perovskite for application as a photosensitive material solar cell. Morphological (SEM), structural (DRX), topographic (AFM) and absorption regions in UV-vis were also applied. All cells were evaluated according to the open circuit potential (Voc), photocurrent density (Jsc), curve filling factor (FF) and efficiency (ƞ). The results revealed promising parameters for CdS and MAPbI3 solar cells, which showed the best energy conversion efficiency among the manufactured devices. The studies carried out from the modification of the preparation of the semiconductor layer, by electrodeposition of np-TiO2, showed progressive results, both in obtaining these films and in the photoelectric performances presented by the cells, explained by the roughness factor. In summary, the study focused on the photoelectrochemical performances of different photosensitive compounds when applied in photosensitized solar cells. In this sense, we seek to optimize these performances by modifying the deposition mode of the semiconductor layer, in addition to the synthesis of compounds with high photoactive potential.