Thermal stable red phosphor Sm~(3+) doped Na_3MgZr(PO_4)_3: the synthesis, site occupation and photoluminescence property investigation

摘要

Sm~(3+) doped Na_3MgZr(PO_4)_3 phosphor was prepared using high temperature solid state reaction and characterized through X-ray diffractometer (XRD) to identify the crystalline phase. The site occupation of Sm~(3+) in Na_3MgZr(PO_4)_3 was discussed based on the XRD and crystal structure analysis. The photoluminescence emission spectra showed that Na_3MgZr(PO_4)_3:Sm~(3+) could absorb near-ultraviolet light around 403 nm and emit red emissions with dominated peaks at 600 and 647 nm, ascribed to the ~4G_(5/2) to ~6H_(7/2) or ~6H_(9/2) transitions of Sm~(3+) ions, respectively. The optimal doping concentration, the critical distance as well as the interaction mechanism of Sm~(3+) in Na_3MgZr(PO_4)_3 were discussed. Moreover, the temperature dependent luminescent properties were measured and revealed that Na_3MgZr(PO_4)_3:Sm~(3+) had excellent thermal stability.