Solid state mechanochemical synthesis of multinary metal halide semiconductors for optoelectronicsfrom powder to thin film

Resumen

In the past decade, lead halide perovskites, as well as other multinary metal halides – including lead-free alternatives – have shown to be promising materials for their use in optoelectronics. Therefore, new ways of producing high-purity semiconductors in large scale are actively sought after. Hence, the main aim of this doctoral thesis is the development of perovskites and related semiconductors using solvent-free methods. Furthermore, with the prospect of the use of such materials in optoelectronics on an industrial scale, the focus is put on working with benign materials for the development of alternatives to toxic perovskites. Mechanochemical synthesis has recently emerged as a highly convenient and reliable method to obtain high-quality lead halide perovskites, as well as other lead-free multinary metal halides. Hence, this thesis contributes to a material study for the development of perovskites and related materials via a solvent-free mechanochemical route and the investigation of the fundamental characteristics thereof. Furthermore, with the interest in the implementation of these high-purity semiconductors in optoelectronics – besides a material study – this thesis contributes to the investigation of a novel manner for the fabrication of thin film perovskites via single-source vacuum deposition of mechanochemically-synthesized perovskite powders. As such, this work paves the way to a new manner for both understanding the formation of perovskites, as well as an alternative way for thin film development with the prospect of the fabrication of applications in the field of optoelectronics.