|
A novel red SrMoO"4:Sm^3^+,R^+ (R^+ = Li^+, Na^+, K^+) phosphor was
prepared by solid state reaction method. XRD results showed that 950 ^oC
was a suitable sintered temperature for preparation of SrMoO"4:Sm^3^+
phosphors. The emission spectra of the SrMoO"4:Sm^3^+ phosphors consisted
of some sharp emission peaks of Sm^3^+ ions centred at 562 nm, 601 nm, 646
nm, 703 nm, generating bright orange-red light. Luminescence concentration
quenching could be observed when the doping concentration of Sm^3^+ ions
was more than 2 mol%. The introduction of charge compensator R^+ (R^+ =
Li^+, Na^+, K^+) into the host efficiently enhanced the luminescence
intensity of the SrMoO"4:Sm^3^+ phosphors. The CIE chromaticity coordinates
of the Sr"0"."9"6MoO"4:0.02Sm^3^+,0.02Na^+ phosphors was quite close to
that of commercial red Sr"2Si"5N"8:Eu^2^+ phosphors. These
SrMoO"4:Sm^3^+,R^+ (R^+ = Li^+, Na^+, K^+) phosphors may be potentially
used as red phosphors for white light-emitting diodes.
|
