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Title: Structural and electronic properties of tin ternary oxides
Author: Riedel, Caroline
ISNI:       0000 0004 8499 3731
Awarding Body: Imperial College London
Current Institution: Imperial College London
Date of Award: 2017
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Metal oxides are one of the most important groups of materials with great technological importance. The variety of their physical and chemical properties allows for a multitude of applications unsurpassed by other material classes. Even though decades of research have gone into the understanding of their properties and the development of new materials there is still much to learn. This work aims to provide new insight into known materials such as SnWO4 and SrSnO3 as well as to develop new materials (by doping) to enhance the properties of the parent compounds. All materials investigated in this thesis are Sn based ternary oxides with properties allowing for possible application as photocatalysts or transparent conductive oxides. Therefore, in depth characterisation with X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), transmission electron microscopy (TEM), and atomic force microscopy (AFM) of bulk and thin film materials was undertaken. The organisation of this thesis is as follows, Chapter 1 will give an introduction into key areas regarding metal oxides as well as the structure of the metal oxides investigated. Chapter 2 will provide the reader with background information, while Chapter 3 describes the practical details of the experimental techniques used. Chapter 4 presents results of the core levels and electronic structure of SnWO4 obtained with soft and hard X-ray photoelectron spectroscopy. In chapter 5 the growth behaviour of SrSnO3 as epitaxial thin films and possible effects this might have on the electronic structure is investigated followed by the characterisation of Ru-doped SrSnO3 in chapter 6. Chapter 7 focuses on the experimental verification of the theoretical work on Pb-doped SnO2 and the study of both the core levels as well as the electronic structure of Sn1-xPbxO2. The final chapter concludes this thesis and gives a summary of the results as well as an outlook on future work.
Supervisor: Payne, David ; McLachlan, Martyn Sponsor: King Abdullah University of Science and Technology
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral