Photoluminescence properties of Ca2Si5N8:Eu2+ nitride phosphor prepared by carbothermal reduction and nitridation method

Eu2+ ion-doped nitride phosphor, Ca2Si5N8:Eu2+, was synthesized by the carbothermal reduction and nitridation (CRN) method and the photoluminescence properties were characterized. It showed a broad absorption band between 250 and 550nm which was efficiently excited by blue LEDs (400-470nm) and a strong emission band peaking at 600nm with a FWHM of 80nm. The obtained phosphor provided saturated color chromaticity (0.589, 0.407) to generate warm-white light in phosphor-converted white LEDs.