In-air self-reduction synthesis and luminescence properties from Mg21Ca4Na4(PO4)18:Eu2+-Eu3+ excited using ultraviolet light

A series of Mg21Ca4Na4(PO4)(18):Eu2+-Eu3+ phosphors was successfully synthesized using a high-temperature solid-state method in an air atmosphere. The phase structures and luminescence properties of the samples were studied in detail. The phosphors exhibited strong visible light emission under different wavelengths of ultraviolet light excitation. By harmonizing the doping concentration of Eu3+ to adjust the relative luminescence intensity of Eu2+ and Eu3+, a colourful emission of phosphors could be achieved. In addition, the colour coordinates of the International Commission on lighting indicated that Mg21Ca4Na4(PO)(18):Eu2+-Eu3+ could be considered as a potential blue, orange and red phosphor for white light-emitting diode applications.

Automated summary

A series of phosphors with strong visible light emission and colorful effects were successfully synthesized. By adjusting the relative luminescence intensity of Eu2+ and Eu3+, a colorful emission of phosphors could be achieved. The phosphor could be considered as a potential blue, orange, and red phosphor for white light-emitting diode applications according to the color coordinates of the International Commission on lighting.