Solvothermal assisted synthesis of spin coated SnO2 thin films
Paper ID : 1400-ICNS
Ali Tavazohi1, Hosein Abdizadeh2, Mohammad Reza Golobostanfard *3
1School of Metallurgy and Materials Engineering, Hossein Abdizadeh, College of Engineering, University of Tehran, Tehran, Iran
2University of Tehran
3University of tehran
This paper demonstrates the potential of a new synthesis approach to obtain SnO2 thin films with triangle, cubic, and rutile morphologies by spin coating solvothermal treated solutions. Films are characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV-Vis spectroscopy. Formation of nearly pure SnO2 phase could be detected by means of XRD; however, high purity and crystallinity of the films cannot be proved by XRD due to low thickness of the films. In spite of the effects of precursors, solvent, pH, and additives on morphological diversity of spin coated films, growth procedure which is determined by solvothermal and calcination conditions and the number of layers, was investigated. As the solvothermal temperature increases, triangle SnO2 particles thicken and form cubic morphology. On the other hand, when calcination temperature enhances, triangle particles prefer to form octahedra particles. By increasing the number of layers, number of small particles which are accessible for large particles increases and follows by Ostwald ripening mechanism. As expected, enhancement of number of layers is accompanied by increase in absorbance. Each of obtained morphologies causes to form tin oxide thin films with different thickness and morphology.
Tin oxide; Solvothermal method; Spin coating; Particle growth.
Status : Abstract Accepted (Poster Presentation)