Self-reduction synthesis and luminescence properties of Eu, Dy co-doped SrMg2 (PO4 )2 phosphor

Abstract

A series of SrMg₂ (PO₄ )₂ :Eu²⁺ -Eu³⁺ ,Dy³⁺ phosphors was synthesized successfully using a high-temperature solid-state method in an air atmosphere. The structures were studied in detail using X-ray diffraction (XRD) and the luminescence properties of the samples. SrMg₂ (PO₄ )₂ :Eu²⁺ -Eu³⁺ samples can emit adjustable blue-violet light by controlling the proportion of dopant concentration of europium and dysprosium under 340 nm excitation. Dy³⁺ exhibits typical blue and yellow emission under 350 nm excitation. The energy transferred from Eu³⁺ to Dy³⁺ in Dy and Eu co-doped system was determined by comparing the fluorescence spectra of single-doped system. In addition, the colour coordinates of the International Commission on lighting (CIE) indicated that SrMg₂ (PO₄ )₂ :Eu²⁺ -Eu³⁺ ,Dy³⁺ could be considered as a potential blue-purple phosphor for white light-emitting diode applications.

Keywords: SrMg2(PO4)2:Eu2+-Eu3+,Dy3+ energy transfer; rare earths; self-reduction.