Synthesis and photoluminescence properties of BaAlO:Eu red phosphor.

Eu-doped BaAlO red phosphors were synthesized by high-temperature solid-state reaction. The crystal structure, morphology and luminescence properties were investigated by XRD, TEM and photoluminescence spectroscopy. The effect of calcination temperature, Eu concentration as well as charge compensators on the luminescence properties was also investigated. Characteristic orange-red emission at 589 nm was detected under 394 nm excitation. The best performance could be derived for the sample calcined at 1450 °C. With the increase of Eu concentration, the emission intensities increased gradually up to the Eu concentration of 12 %. The emission intensities could be enhanced with Li, Na and K introduced as charge compensators. The results showed that BaAlO:Eu phosphors with charge compensator had potential application in the fields of near-UV-excited WLEDs. [ABSTRACT FROM AUTHOR]