Alternative halide perovskite structures for light-based applications

The foundation of LEDs, transistors, mobile phones, and many other devices relies on the extraction, preparation and commercialization of semiconductors. The development of newer technologies imposes the research to constantly find alternatives in order to push the efficiencies, reduce the production costs, or find more sustainable synthetic procedures. In this optic, halide perovskites have demonstrated in the last decades to be an excellent alternative to the common semiconductor materials for the design of optoelectronic devices. Solar cells, LEDs, catalysis, and sensors are just a few of the multiple fields of application in which halide perovskites can shine. However, the toxicity of lead, which is the common metal employed, and the harsh conditions for the synthesis are limiting the possible widespread commercialization of these materials. For this reason, the aim of the thesis will focus on the design, preparation, and characterization of alternative halide perovskite structures, less explored compared to the most common ABX3. The main goal is to achieve various compositions, replace toxic metals, and find more sustainable synthetic routes for the preparation of the materials. Moreover, the samples will be employed in many fields such as solar harvesting for solar cells, LEDs, CO2 reduction, and optical thermometric devices, demonstrating the valuable features of these materials.