Aims:This paper aims to study the luminescence performance of Mg0.388Al2.408O4∶Mn2+phosphor and its application prospects in the field of wide color gamut backlight display.Methods:Mg0.388 Al2.408O4∶Mn2+phosphor was synthesized by the high temperature solid state method.The phase structure,photoluminescence characteristics and thermal stability of Mg0.388Al2.408O4∶Mn2+phosphor were studied.Results:The phosphor had a wide excitation band of 260～510 nm,with the strongest excitation peak in the blue spectral region,indicating that Mg0.388Al2.408O4∶Mn2+green light phosphor could be effectively excited by commercial blue light chips.Under the excitation of ultraviolet and blue light,the sample exhibited bright green emission,with a narrow full width at half maximum(FWHM=40.4 nm),a high color purity(75.85％),and a high quantum efficiency(81.5％).The calculated Huang-Rhys factor indicated that the sample had low electron-phonon coupling strength and great thermal stability.The prepared LED device had a color gamut of up to 118.2％NTSC.Conclusions:Mg0.388Al2.408O4∶Mn2+phosphor has broad application prospects in the field of wide color gamut backlight display.
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