Influence of La substitution on local structural and photoluminescence properties of SrTiO3:Pr phosphor

Author(s)

Deltreggia, Lucas Angelini ^[1] ; Basso Bernardi, Maria Ines ^[2] ; Mesquita, Alexandre ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Geosci & Exact Sci, Rio Claro, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: SCRIPTA MATERIALIA; v. 157, p. 15-18, DEC 2018.
• Web of Science Citations: 4

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. (AU)

• FAPESP's process: 13/12993-4 - Synthesis and characterization of luminescent nanostructured semiconductor materials
• Grantee: Alexandre Mesquita
• Support Opportunities: Regular Research Grants