Preparation and Characterization of Organic-Inorganic hybrid MAPbBr3 Perovskite

Abstract

An important application in recent years is organic-inorganic perovskite materials that have adjustable optical properties. In this work three types of Methyl ammonium lead bromide MAPbBr3 perovskites were prepared by changing the concentration of the lead halide. The preparation of films with the quality of materials and morphology required to effectively harness solar radiation, extract charge carriers in interfaces and effectively manage lead (Pb). Rotational coating is one of the most widely used production methods for perovskite-treated photovoltaics. The heat flux during rotation and the subsequent evaporation process lead to fast and strong ionic reactions between metal cations and organic anions, resulting in the formation of a well-crystallized structure. with the increase in the lead halide concentration the crystalline structures to the (320) and (211) plane spacing, broadness of (XRD) peaks increases and intensity decreases respectively for the cubic perovskite material that indicates the cubic phase of the material. For the UV-Visible absorption and photoluminescence study the absorption edge increased by (31nm) while the energy band gap decreased by (0.12eV). This led to the absorption edge and the energy band gap towards a red shift. The morphology of perovskites which prepared contains smaller crystalline capillary spaces and greater crystallization.