Effect of ZnS on Morphological and Optical Properties of CH$_3$NH$_3$PbI$_3$ Micro Rods

Organometallic perovskite is one of the potential materials in the various optoelectronic research fields. This research work demonstrates the synthesis of CH$_3$NH$_3$PbI$_3$ perovskite micro rods with ZnS composite for optoelectronic applications. Incorporating ZnS in the perovskite material caused bandgap variation in the visible wavelength energy range. Structural and chemical compositions have been observed using X-ray diffraction (XRD), Scanning electron microscope (SEM), and Fourier transform infrared spectroscopy (FTIR). The optical properties were observed via Uv-Vis spectroscopy which showed an absorption coefficient of the order of 104 cm$^{-1}$. The bandgap of the thin films was calculated using the Tauc relation and a preferable bandgap was obtained for solar cell application.