Photoluminescence studies of YAlO₃:Bi³⁺ co-doped with Dy³⁺ nano phosphors for WLED applications

YAlO₃:Dy³⁺ powders activated with Bi³⁺ ions were synthesized by polyol method. XRD shows that all samples are crystallized to the pure orthorhombic phase of YAlO₃. The SEM analysis show that particles are spherically shaped irregularly with a size between 80-100 nm, which may be due to agglomeration. Luminescence properties of Bi³⁺ and Dy³⁺ in YAlO₃ were investigated in detail. The co-doping of Bi³⁺ enhances the Dy³⁺ emission intensities because of energy transfer phenomena which makes it a suitable candidate for LED and display applications. (author)