Divalent copper ions-doped strontium magnesium phosphate nanopowder: synthesis and characterization

Abstract

In this present work, we demonstrate the findings of synthesized Cu²⁺-doped strontium magnesium phosphate (SrMg₂(PO₄)₂) nanopowder by solid-state reaction method. The structural, morphological, optical, and luminescence properties were studied by various experimental techniques XRD, SEM–EDS, FTIR, Optical absorption, EPR, and Photoluminescence. According to X-ray diffraction analysis, the prepared nanopowder exhibits a monoclinic phase. Crystallite size, micro-strain, and dislocation density were calculated, and compared with the values obtained from the Williamson–Hall method which are agreed well. The surface morphology of the prepared sample was analyzed by SEM and calculated grain size using a histogram. EDS spectrum shows elements present in the sample. FTIR peaks have revealed the presence of phosphate-related vibrational bands, P–O–H, and hydraxyl ions. EPR and optical absorption studies have been made to determine the site symmetry of Cu²⁺ ion. The PL emission spectrum shows various bands in visible region. Chromaticity coordinates are indicating white color in CIE diagram. CRI and CCT values also calculated. The results are suggesting that the prepared material is a source of cold white light and is suitable for commercial LED applications.