Artículo de revista
Preliminary evaluation of the up-conversion emission of Y2O3:Er-Yb thin films prepared by a solid state photochemical deposition method
Fecha
2018Registro en:
Journal of Luminescence 204 (2018) 401–409
00222313
10.1016/j.jlumin.2018.08.034
Autor
Cabello Guzmán, G.
González, Diego
Caro Díaz, C.
Lillo Arroyo, L.
Valenzuela Melgarejo, F.
Cárdenas Triviño, G.
Buono-Core, G. E.
Chornik Aberbuch, Boris
Huentupil, Yosselin
Institución
Resumen
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. X-ray 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 (2H11/2, 4S3/2)→4I15/2 transitions of the Er3+ ions. These emissions greatly increase in intensity with the addition of Yb3+ ions in the preparation of the co-doped films. This phenomenon is explained based on the efficient Yb3+ → Er3+ energy transfer processes.