Journal
JOURNAL OF LUMINESCENCE
Volume 204, Issue -, Pages 401-409Publisher
ELSEVIER
DOI: 10.1016/j.jlumin.2018.08.034
Keywords
Thin films; Photochemical deposition; Up-conversion emission; Energy transfer
Categories
Funding
- CONICYT-FONDEQUIP Program [EQM-140088]
- Research Office at the University of Bio-Bio [181109-4/R]
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Y2O3 thin films doped with different concentrations of erbium ions and co-doped with 10 mol% of ytterbium were synthesized by a solid state photochemical deposition method followed by a subsequent calcination process. The photo-reactivity of the thin films was monitored by Fourier transform infrared (FT-IR) spectroscopy. Xray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), UV-vis spectroscopy and photo-luminescence (PL) were employed to characterize the samples. The results reveal that Y2O3:Er films under 980 nm irradiation exhibit characteristic up-conversion emissions that are focused in the green region of the spectrum; these emissions are assigned to the (H-2(11/2), S-4(3/2)) -> I-4(15/2) transitions of the Er3+ ions. These emissions greatly increase in intensity with the addition of Yb3+ ions in the preparation of the codoped films. This phenomenon is explained based on the efficient Yb3+ -> Er3+ energy transfer processes.
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