The use of fossil fuels results in the release of greenhouse gases, detrimental to the environment. Hence, there has been increased investment in renewable energies, specifically in solar energy, as it is a clean, noise-free, and abundant source. Perovskite materials are promising candidates for the study of solar energy conversion into electricity due to their wide absorption of solar spectrum light, compositional versatility, defect tolerance, ease of processing, and lower cost compared to silicon used in commercially available solar panels. Therefore, this dissertation aimed to investigate the properties of inorganic perovskite Cs3Sb2I9  (CSbI) using the organic molecule thiophene (C4H4S) in the powder preparation via the anti-solvent method. The purpose was to examine its properties and prepare a photovoltaic device by doctor blade deposition, using a chitosan solution as a dispersant to form films, measuring the capability of these materials to convert solar energy into electrical energy. By producing materials with 0%, 9%, 17%, and 34% (m/m) of thiophene [(CSbI_9), (CSbI_17), and (CSbI_34)], the additive improved crystallinity, suppressed secondary phases, and elucidated the same crystallographic phase. It induced changes in the bandgap (2.23 eV, 2.00 eV, 1.95 eV, and 2.35 eV) and subtle modifications in the precipitate morphology, transitioning from coarse hexagonal plates to smaller needle and leaf-shaped particles with reduced agglomeration. Complementary EDS studies confirmed the profile for the perovskite in  question,  without  revealing  thiophene  components  (in  this  case,  sulfur),  indicating  the absence of  the  additive post-synthesis.  Raman spectroscopy exhibited the same scattering profile for the samples, with sample CSbI_9 showing lower scattering intensity, indicating fewer phonon trap sites. When constructing a microcell with the FTO/TiO2/Perovskite/NiOx/Ag configuration, a power conversion efficiency (PCE) of 0.42% was achieved for the perovskite doped with 9% (Voc: 0.059V; Isc=0.27mA, and FF=19.37%). This was the best result compared to 0.19% with the perovskite containing 17% and 0.06% with 0% thiophene. The reduced gap and fewer phonon trap states due to the electron-phonon effect made CSbI_9 the best-constructed device. The results offer perspectives for the study of additives in modulating the properties of inorganic materials for solar cells and exploring new methods for thin film deposition.