Cerium oxide thin films are deposited on glass substrates with various mole concentrations by nebulized spray pyrolysis technique. The films are characterized for, XRD, SEM, AFM, FTIR, PL, UV-ViS and XPS. All films exhibit a cubic fluorite structure with preferred orientations along (2 0 0) direction with an average size of 30 nm. The films exhibit dense, smooth and crack-free spherical like tiny particles composed of nanostructures with some uneven size 52 nm. It also exhibits nicely separated conical columnar microstructure. FT-IR analysis confirm the presence of (Ce=O) terminal stretching and phonon band (Ce-O) of metal oxide network. PL analysis indicates the presence of indigo and yellow emission in the visible region centered on ~425 and ~579 nm respectively. UV-ViS spectra reveal that the films are transparent (60 %) in the visible region. Optical parameters like refractive index, optical conductivity and band gap are calculated for different mole concentrations. XPS analysis reveals the existence of Ce, O and C and the dominant occurrence of Ce4+ rather than Ce3+ in the films.
Suresh, R.; Ponnuswamy, V.; and Mariappan, R.
"Impact of Mole Concentration on the Structural and Optical Properties of Nebulized Spray Coated Cerium Oxide Thin Films,"
International Journal of Thin Film Science and Technology: Vol. 4
, Article 5.
Available at: https://digitalcommons.aaru.edu.jo/ijtfst/vol4/iss1/5