X-ray and Raman Study of CH3NH3PbI3 Perovskite Nanocrystals

Abstract

Organic-inorganic hybrid perovskite nanocrystals have gained a considerable attention for optoelectronics applications due to their unique properties like high light absorption coefficient, band gap tunability and larger diffusion length. In this research, ligand-assisted reprecipitation method (LARP) was employed to synthesize CH₃NH₃PbI₃ nanocrystals (NCs). The optical and structural properties of nanocrystals depend on their size. X-ray diffraction (XRD)  and small angle X-ray scattering (SAXS) techniques were used to determine the crystal structure, particle size distribution and surface to volume ratio of CH₃NH₃PbI₃ nanocrystals. The organic–inorganic interactions of  CH₃NH₃PbI₃  nanocrystals were studied by Raman spectra at room temperature. This study will provide the basis to interpret the morphological properties of perovskite nanocrystals for their full exploitation in different optoelectronics applications.