Self-reduction synthesis and luminescence properties of Eu, Dy co-doped SrMg (PO ) phosphor.

A series of SrMg (PO ) :Eu -Eu ,Dy 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. SrMg (PO ) :Eu -Eu samples can emit adjustable blue-violet light by controlling the proportion of dopant concentration of europium and dysprosium under 340 nm excitation. Dy exhibits typical blue and yellow emission under 350 nm excitation. The energy transferred from Eu to Dy 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 SrMg (PO ) :Eu -Eu ,Dy could be considered as a potential blue-purple phosphor for white light-emitting diode applications.