Materiály pro solární palivové články

Abstract

This thesis focused on the investigation of optical properties of non-stoichiometric nickel oxide for solar fuel cell applications.The theoretical part of the thesis outlines the principle of a solar fuel cell with emphasis on a photocatalytic cell for water splitting. Furthermore, the thesis characterizes the properties of nickel oxide, referred to as NiOx, relevant for these applications. In the following chapters of the theoretical part, the technologies for the preparation of thin films, in particular magnetron sputtering, are described, and a detailed description of the optical properties of thin films and ellipsometry as the main technique used in the thesis to characterize the thin films is given. The experimental part of this work is the preparation of thin films by the magnetron sputtering technique with a radio frequency diode under different deposition conditions, which are mainly the magnetron power and the oxygen content in the deposition atmosphere. In addition to the influence of the above conditions during deposition, the properties of the zinc-doped layers were also investigated on one set of samples. The prepared samples were characterized by the technique of Mueller matrix spectroscopic ellipsometry, based on the results of which it was possible to determine in particular the graph of the complex dielectric function, the thickness of the layers, the width of the band gap and the graph of light absorption as a function of its wavelength.