Effect on Morphology and Optical Properties of Inorganic and Hybrid Perovskite Semiconductor Thin Films Fabricated...

In recent time, organic-inorganic halide perovskite solar cells govern photovoltaic field, due to its remarkable development on the power conversion process. Still, large variations in device efficiency and basic physical properties are reported. This is due to variations during film fabrications and consecutive treatments employed. Here, we report a layer by layer deposition of inorganic perovskite (CsBi₃I₁₀) and lead halide perovskite (CH₃NH₃PbI₃) thin films. We find that the absorbance for corresponding thin film goes on increasing dramatically. UV-vis spectrum of film recorded to find the band gap of films, ˜1.55 eV optical band gap have been obtained for the film fabricated layer by layer. We further study the fabrication of different perovskite layers impact on microstructure, surface morphology and optical properties. The optical and structural characterization outcomes all suggests the perovskite films processed by using the layer by layer fabrication are well controlled, making this processes an auspicious technique to fabricate thin-films for numerous prospective device applications and scientific studies.