Eu^3+/2+ co-doping system induced by adjusting Al/Y ratio in Eu doped CaYAlO₄: preparation, bond energy, site preference and ⁵D₀-⁷F₄ transition intensity.

ABSTRACT: CaY_1-x Al_1+x O₄:2%Eu (x = 0, 0.1, 0.2) phosphors have been synthesized via a solid-state reaction process. XRD patterns indicate that they are pure phase. The photoluminescence properties of the CaY_1-x Al_1+x O₄:2%Eu phosphors exhibit both the blue emission of Eu²⁺ (4f⁶5d¹-4f⁷) and red-orange emission of Eu³⁺ (⁵D₀-⁷F_1,2,3,4) under UV light excitation, which showed that the Eu^3+/2+ co-doping system was obtained by adjusting the Al/Y ratio. Eu³⁺ ions can be reduced to Eu²⁺ ions when the Al/Y ratio was changed. In this work, the bond energy method was used t

SUBMITTER: Pan Y 

PROVIDER: S-EPMC9081747 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature