Growth and characterization of films of perovskite based organic-inorganic hybrid materials for electronics

The films obtained in the optimized deposition conditions on different substrates (crystalline, amorphous and flexible), results by the different analysis to have good structural, morphological and optical quality. it is analyzed the change in optical properties with the change of one component in the 2D [(CnH2n+1NH3)2CuCl4] and 3D [CH3NH3SnX3] series structure to understand the possible correlations between structure and optical properties. Besides, the 2D layered hybrid structures have attracted the scientists' interest because these systems act as the artificial multi-quantum well structures. In principle in this type of structure it is possible to obtain excitonic states and so photoluminescence and electroluminescence, by quantum and dielectric confinement effects. Besides, the intrinsic two-dimensional layered structure of some hybrids, added to self-assembling properties, can lead to the possibility to design and synthesize an emitter material with the capability to control electron/hole drain and separation. Analysis of the absorption data was carried out to test the optical quality of SSTA deposited films as well as to determine the predominant optical transition and electronic configuration, while the presence of excitonic states transition have been investigated by photoluminescence measurements performed on the films. All the analyzed 2D layered copper structures realize a photoluminescence emission in the UV. In particular (C2H5NH3)2CuCl4 compound thanks to its high stability, low hygroscopicity, and good conduction properties, results a good candidate to UV-LED applications. Transport properti