Identification of different iron sites in β-Ga2O3 nanoparticles by spectroscopic methods

This paper reports the influence of Fe doping degree (1%, 3%, 5%) on structural and optical characteristics of gallium oxide nanoparticles evidenced by XRD, Raman, UV-vis and EPR methods. XRD studies reveal a monoclinic β-Ga2O3 structure. The lattice expansion sustains the substitutional incorporati...

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Bibliographic Details
Main Authors: Toloman, D, Popa, A, Stan, M, Silipas, T D, Biris, A R
Format: Conference Proceeding
Language:English
Subjects:
Gallium oxides
Identification methods
Iron
Nanoparticles
Optical properties
Raman spectra
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Summary:This paper reports the influence of Fe doping degree (1%, 3%, 5%) on structural and optical characteristics of gallium oxide nanoparticles evidenced by XRD, Raman, UV-vis and EPR methods. XRD studies reveal a monoclinic β-Ga2O3 structure. The lattice expansion sustains the substitutional incorporation of Fe ions in Ga2O3 host. The presence of a αFe2O3 secondary phase was evidenced for the samples doped with 3 and 5 % Fe only by Raman scattering. From UV-Vis absorption and EPR spectroscopy was evidenced the presence of isolated Fe3+ ions in octahedral sites, Fe2O3 particles, Fex3+Oy and oligomeric clusters.
ISSN:0094-243X
1551-7616
DOI:10.1063/1.4938455