In recent years, halide perovskites have demonstrated exceptional optoelectronic properties. This new class of semiconductor materials has proved an extraordinary potential for the production of low-cost solar cells and light-emitting devices. Perovskite solar cells have made lightning progress, and now boast efficiencies over 26%, on par with the best silicon-based solar cells. This success leads to significant research effort to understand the physical origins of their performance. Halide perovskites are also promising for spintronic applications. They present a strong spin-orbit coupling, a relatively long spin relaxation times, and optical accessibly for spin generation and defection. Room temperature coherent optical manipulation of spins has been recently achieved.High spin injection efficiency has been demonstrated at room temperature at a chiral perovskite/III-V interface. The objective of the Master thesis, which could be followed by a PhD thesis, is to explore the exciton and spin properties of halide perovskites.