Optical and structure properties of CH3NH3PbI3 perovskite films doped with CesiumA.M. El-naggar, Mohamed Bakr Mohamed, M.M. Osman, Zein K. Heiba, A.M. Kamal, A.M. Aldhafiri, Israa M. Alhamss and Anwar Q. AlanaziEur. Phys. J. Appl. Phys., 96 1 (2021) 10302DOI: https://doi.org/10.1051/epjap/2021210160