Preliminary evaluation of the up-conversion emission of Y2O3:Er-Yb thin films prepared by a solid state photochemical deposition method

Cabello-Guzman, G.; González D; Caro-Díaz, C; Lillo-Arroyo, L; Valenzuela-Melgarejo, F; Cardenas-Trivino, G; Buono-Core G.E.; Chornick, B; Huentupil, Y.

Abstract

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.

Más información

Título de la Revista: JOURNAL OF LUMINESCENCE
Volumen: 204
Editorial: Elsevier
Fecha de publicación: 2018
Página de inicio: 401
Página final: 409
Idioma: english
Notas: https://doi.org/10.1016/j.jlumin.2018.08.034