Optical properties of RE (RE = Eu³⁺, Dy³⁺, Sm³⁺, Ce³⁺)-doped BaSr₂(PO₄)₂ phosphor

Abstract

This article reported the photoluminescence properties of a rare-earth (RE; Eu³⁺, Dy³⁺, Sm³⁺, Ce³⁺)-doped BaSr₂(PO₄)₂ phosphor. A series of rare-earth (RE; Eu³⁺, Dy³⁺, Sm³⁺, Ce³⁺)-doped BaSr₂(PO₄)₂ has been synthesized by a wet chemical method. The SEM images indicated that the rare-earth-doped phosphate-based phosphor was well crystallized, with a homogeneous particle size distribution. Rare-earth (RE; Eu³⁺, Dy³⁺, Sm³⁺, Ce³⁺)-doped BaSr₂(PO₄)₂ phosphor shows the characteristics optical spectra that measured under near UV and visible range. Here, PL emission spectra for Eu³⁺ is located at 590 and 613 nm; Dy³⁺ band centred at 480 and 574 nm, while Sm³⁺ located at 563, 601 and 642 nm, respectively, and Ce³⁺ also showed at 329 nm and 343 nm. All these bands were assigned due to tod-f and f-f transitions of RE ions. So, based on the properties of these reported phosphors, they may be a promising host for display applications.