High-performance ultra-narrow-band green-emitting phosphor LaMgAl11O19:Mn2+ for wide color-gamut WLED backlight displays

A high-performance ultra-narrow-band green-emitting phosphor LaMgAl 11 O 19 :0.28Mn 2+ ( λ em = 517 nm, FWHM ∼24 nm) is prepared by a solid-state reaction in air, which can be applied in a pc-wLED with wide color-gamut value of 131% NTSC and 97.8% Rec. 2020.