Influence of La substitution on local structural and photoluminescence properties of SrTiO3:Pr phosphor
Abstract: Pr3+-doped perovskite-based SrTiO3 phosphors have been developed as a potential red phosphor. In this paper, we report the substitution of La3+ ions for Sr2+ ions in order to promote Sr vacancies to further enhance photoluminescence. Given that the La content increases, an enhancement in the intensity of all emissions is observed, mainly for D-1(2)-H-3(4) and P-3(0)-H-3(6) transitions. This enhancement of photoluminescence emissions is associated with disorder in the lattice caused by La incorporation. Raman measurements and X-ray absorption near edge structure (KANES) spectra at the Ti K-edge identify this disorder as a function of the La content. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
Author(s): Deltreggia, LA; Bernardi, MIB; Mesquita, A
SCRIPTA MATERIALIA
Volume: 157 Pages: 15-18 Published: JUL 2018
DOI: 10.1016/j.scriptamat.2018.07.018
