Micro- y nanoestructuras de ZnO dopado con metales.Síntesis y crecimiento ordenado sobre sustratos estructurados por láser

Resumo

This research work is focused on the synthesis of micro- and nanostructures of ZnO doped with different metallic elements with the aim of assessing their properties and potential applications in optoelectronic and photocatalytic devices.To this end, the possibility of spatially controlling their selective growth on various types of substrates previously structured with ultrashort laser pulses has also been analysed.ZnO is a broadband semiconductor belonging to the group of transparen tconductive oxides (TCO´s) whose properties are of special interest for differentapplications. It is known that the use of suitable dopants makes it possible to very significantly modify and enhance some of its properties, especially electrical, optical and luminescent ones. This is the underlying reason for analysing how doping with different alkali (Li, K) and transition (Zr) metals influences the properties of micro- and nanostructures synthesized by the vapor-solid (VS) method. This growth technique allows to obtain structures with very good crystalline quality and does not use catalysts, which avoids the incorporation of unwanted impurities in the generated structures. Different tests have been carried out aimed at optimizing the growth process for each dopant, varying both the conditions of the thermal treatments, through the use of different precursors, and the use of different levels of doping. These tests have been fed back through the different characterization techniques used, of a morphological, compositional, structural and optical nature...