Optimization of molar concentrations for enhanced crystallinity and bandgap tuning of ZrO2 thin films via spray pyrolysis for advanced optical applications
Year: 2024
Type: article
Abstract: In this study, Zirconium oxide (ZrO2) thin films were synthesized on glass substrates at 400°C using the Spray Pyrolysis method, due to its simplicity, cost-effectiveness, and precise control. The films were prepared at varying molar concentrations (0.1, 0.15, and 0.2 M) and analyzed for their structural, optical, and morphological properties. X-ray diffraction (XRD) confirmed that all films exhibited a tetragonal crystalline structure with a preferred orientation along the (101) plane. The crystallite size, calculated using the Scherrer equation, reached a maximum of 27.26 nm at 0.2 M concentration, indicating improved crystallinity with higher concentration. Optical studies revealed a decrease in transmittance and an increase in absorbance in the visible region as the concentration increased, accompanied by a reduction in the optical band gap from 3.84 to 3.57 eV and an increase in Urbach energy. Scanning Electron Microscopy (SEM) images showed that the films had a dense and smooth morphology, while Energy Dispersive X-ray (EDX) analysis confirmed the elemental presence of zirconium and oxygen in the films.
Language: English
Topic: ZnO doping and properties
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4402960374