Dear Paramita, thank you for asking this very interesting technical question. In this context please have a look at the following potentially useful article wich might help you in your analysis:
Structural, optoelectronic, and morphological study of indium-doped methylammonium lead chloride perovskites
Article Structural, optoelectronic, and morphological study of indiu...
This article has been posted as public full text on RG, so it can bee freely downloaded as pdf file. Also please see the following relevant paper:
Do grain boundaries dominate non-radiative recombination in CH3NH3PbI3 perovskite thin films?
Article Do Grain Boundaries Dominate Non-Radiative Recombination in ...
Good luck with your research and best wishes, Frank Edelmann