Regensburg 2019 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session III
CPP 37.11: Poster
Mittwoch, 3. April 2019, 11:00–13:00, Poster B1
Preparation of MgxZn1−xO nanoparticles through a wet chemical route for applications in optoelectronic devices — •Andreas Ringleb and Derck Schlettwein — Justus-Liebig-Universität Gießen, Institut für Angewandte Physik
Zinc oxide (ZnO) is an n-type semiconductor and a promising candidate for applications in various types of optoelectronic devices due to its wide direct bandgap of about 3.3 eV and high exciton binding energy of approximately 60 meV. The targeted substitution of Zn with magnesium enables a tunable band gap of MgXZn1−XO between 3.3 and 7.8 eV through control of the Mg-content. MgXZn1−XO nanoparticles have been prepared from acetate precursors through a wet chemical route. Thin films have been deposited on quartz and FTO coated glass substrates from pastes by doctor-blading and subsequent drying and/or annealing. XRD and SEM have been used to study the morphology and crystal structure of these films. The modulation of the band gap has been confirmed by UV-Vis spectroscopy. Elemental composition has been studied by XPS and EDX. Nanoparticle size has been measured by means of dynamic light scattering (DLS). A focus has been put on the homogeneity and porosity of the resulting films since they are especially suited for future applications in hybrid photovoltaics, such as dye-sensitized solar cells (DSCs), quantum-dot solar cells (QDSCs) or perovskite solar cells (PSCc).