چكيده به لاتين
Recently, perovskite nanomaterials have received much attention due to their suitable optoelectronic properties. However, effective commercialization of perovskite technology remains challenging due to several issues including stability, multilayer device structure, etc. In this thesis, in order to adjust the exposure properties of the perovskite layer with the aim of engineering the contact surface, improving the morphology of the film, the process of crystallization of the film and the dynamics of the carrier, the method of optimizing the conditions of the annealing process and engineering of additives was used. In Additive Materials Engineering, we aim to achieve high-performance perovskite, improve optical stability by means of simple processing methods. Methylammonium lead iodide was used as perovskite material. The reason for using lead iodide was to adjust the morphology and dynamics of the charge carrier and to increase the lifetime of the charge carrier in the perovskite layer. By optimizing the thickness, temperature and annealing time, the perovskite film morphology and exposure properties were improved. As a result, the perovskite thin layer with high efficiency was obtained and it was found that the exposure properties also depend on the grain size. By adding bromine as an additive, we tried to change the energy gap and improve optical stability. The use of bromine halogen can significantly increase the stability and brightness, and in addition, by changing the percentage, it can provide the ability to adjust the energy gap. Choosing the right perovskite material, optimizing and using the right additives at the same time can improve the synergistic quality of perovskite films. The high quality perovskite film deposition process was developed at room temperature using suitable additives. Due to the effects of additives, the perovskite film processed at room temperature was adjusted by energy gap. More importantly, the relationship between crystal grain size in perovskite films was discovered. This correlation showed that grain size and grain boundaries affect exposure properties. Such a result provides an opportunity for a perovskite device with a simplified architecture.
