Deposition and characterisation of perovskite thin films

The work presented in this thesis investigates the synthesis, depo-sition and characterisation of halide doped perovskite thin films.Films of methylammonium lead iodide CH3NH3PbI3 were dopedwith Cl and Br ions to investigate the intrinsic differences of theseperovskites. As a result of doping, photoluminescence (PL) spectraconfirmed optoelectronic influence evidenced by changes in banggap energy. Bromine treated perovskites exhibited greater stabilitythroughout this study while Cl treated samples exhibited improvedmorphology. A detailed analysis comprising of scanning electron mi-croscopy and bulk/surface elemental compositional techniques con-firmed morphological improvement due to the presence of Cl ionsdespite being undetected using surface sensitive techniques