A zero-thermal-quenching perovskite-like phosphor with an ultra-narrow-band blue-emission for wide color gamut backlight display applications

A novel perovskite-like K 2 BaPO 4 F:Eu 2+ phosphor exhibits an unprecedented ultra-narrow-band (FWHM = 25 nm) blue-emission ( λ em = 439 nm) and a zero-thermal-quenching property up to a temperature of 125 °C.