Characterization of Gd doped CeO2 thin films grown by ultrasonic spray pyrolysis

Kurtaran, Sema; Kellegöz, Murat; Köse, S.

doi:10.1016/j.optmat.2021.111144

Cited by 23 publications

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“…This conversion of oxidation states from Ce 4+ to Ce 3+ in ceria is possible due to unoccupied 4f states, and it makes this material more suitable for oxygen vacancy creation [2]. Ceria exhibits cubic & hexagonal sesquioxide structures [3] and possesses novel physical and chemical properties leading to a spacious range of applications such as photocatalytic, hydrogen production, gas sensors, etc [4]. Generally, the physical, as well as chemical properties of ceria, are owing to the creation of point defects and micro to nanoscale transformation [5].…”

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confidence: 99%

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures

et al. 2023

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The present report examines the tunability of optical band gap by 150 keV Fe ion implantation in cerium oxide (CeO2) thin films and their electronic structures. X-ray diffraction (XRD) confirms the stable FCC structure and these films lose their crystalline nature with increasing ion fluences. Atomic force microscopy (AFM) shows the morphology changes. Raman measurement exhibits the presence of defect states. UV-Vis spectroscopy reveals that the optical band gap reduces from 3.14 eV to 2.70 eV. These results are well correlated with the electronic structure studies from the X-ray photoelectron spectroscopy (XPS) and X-ray absorption spectroscopy (XAS). The XPS indicates the existence of Ce3+ due to the replacement of Fe3+ which reduces the Ce4+ to Ce3+ ions. XAS at the Ce-M4,5 edge reveals the change in Ce4+→Ce3+ with Fe ion fluence and the O-K edge spectra show that the vacancies are introduced after Fe ion implantation. The edge shifting of the O-K edge confirmed the presence of Ce4+-VO-Ce3+ and Ce3+-VO-Fe3+ networks in Fe-implanted thin films. This reversible ability enables the CeO2-based nanomaterial for energy and environmental-related applications.

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Section: Introductionmentioning

confidence: 99%

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures

et al. 2023

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Effect of zinc doping on the structure and optical properties of iron oxide nanostructured films prepared by spray pyrolysis technique

et al. 2022

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Impact of silver/copper dual-doping on the structure, linear and non-linear optical performance of ZnO thin films

et al. 2022

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Characterization of Gd doped CeO2 thin films grown by ultrasonic spray pyrolysis

Cited by 23 publications

References 43 publications

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures

Effect of zinc doping on the structure and optical properties of iron oxide nanostructured films prepared by spray pyrolysis technique

Impact of silver/copper dual-doping on the structure, linear and non-linear optical performance of ZnO thin films

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Characterization of Gd doped CeO2 thin films grown by ultrasonic spray pyrolysis

Cited by 23 publications

References 43 publications

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO2 and their electronic structures

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO2 and their electronic structures

Effect of zinc doping on the structure and optical properties of iron oxide nanostructured films prepared by spray pyrolysis technique

Impact of silver/copper dual-doping on the structure, linear and non-linear optical performance of ZnO thin films

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Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures

Tunability of bandgap from UV to visible region by transition metal ion implantation in CeO₂ and their electronic structures