Study of Structural Phase Transformation in Halide Pervoskites

Perovskite materials have gained a lot of attention because of their extraordinary optoelectronics properties. Solar cells based on these materials have reached power conversion efficiency of above 20% in a short period of time. However, there has still work to do about their stability and durability. In this work we demonstrate the effect of CH3NH3Cl on PbI2 to produce a perovskite layer. PbI2 , the first precursor, was deposited using common spin coating method mentioned in the literature. The deposited layer was exposed to CH3NH3Cl solution. XRD and UV-Visible characterizations were done. The devices fabricated using this layers have shown power conversion efficiency of 5.4%.