Structural Features of Nanostructured Copper Oxide Thin Films, Synthesized by Spray Pyrolysis Technique

In the present study, the properties of copper oxide thin films prepared by spray pyrolysis were investigated at different substrate temperatures (573 – 723 К) and at constant spraying volume of precursor. The compositions, structural and morphological properties of the films were investigated by field emission scanning electron microscopy, atomic force microscopy and Raman spectroscopy

Determination of fundamental optical constants of Zn2SnO4 films

Examined in this paper have been optical properties of polycrystalline films Zn2SnO4 deposited using the spray pyrolysis method within the range of substrate temperatures 250 °C to 450 °C in increments of 50 °C. The spectral dependences have been found for the following physical quantities: k(), n(), ε1(), ε2() and defined as they change under the influence of substrate temperature Тs. Moreover, using the model by Wemple–DiDomenico it was calculated the dispersion energy Ео and Ed for this oxide. Two independent methods defined band gaps Zn2SnO4, which decreases from 4.21…4.22 eV down to 4.04…4.05 eV with increasing Тs from 250 °C up to 450 °C