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Trivalent terbium (Tb3+) doped double molybdate AGd(MoO4)2(A = Li+, Na+) phosphors have been synthesized by combustion reaction. The crystal structures and luminescent properties of the phosphors are investigated in this paper. The XRD patterns indicate that AGd(MoO4)2:Tb3+ phosphors take on single phase when the precursors are sintered at 700degC for 3 h. The average crystal size is about 2.0 um. LiGd(MoO4)2:Tb3+ and NaGd(MoO4)2:Tb3+ phosphors have the similar luminescent properties. The influences of urea and Tb3+ concentration on the luminescent properties of phosphor samples are also discussed in detail. The results show that Tb3+ activated LiGd(MoO4)2 phosphors is a potential candidate for green phosphor in ultraviolet (UV) -based white LED.

White light emission is generated by combining the blue and red emissions of and , respectively, and by adding the co-doping element in a single host lattice of . The effect of concentration on the emission intensity of is studied, and the emission intensity reaches a maximum at 1% . Energy migration over sites occurs, resulting in concentration quenching, and the concentration quenching mechanism is d-d interaction by Dexter theory. exhibits a high absorption in the near-UV region, and energy transfer from to occurs in . When is introduced in , a green emission band appears and white light is obtained. The results indicate that is an efficient "single host lattice phosphor" for solid-state lighting technology using a UV light emitting diode to generate white light.

White light emission is generated by combining the blue and red emissions of Eu2+and Mn2+, respectively, and by adding the co-doping element Ba2+in a single host lattice of Sr2B2P2O10. The effect of Eu2+concentration on the emission intensity of Sr2B2P2O10:Eu2+is studied, and the emission intensity reaches a maximum at 1% Eu2+. Energy migration over Eu2+sites occurs, resulting in concentration quenching, and the concentration quenching mechanism is d-d interaction by Dexter theory. Eu2+exhibits a high absorption in the near-UV region, and energy transfer from Eu2+to Mn2+occurs in Sr2B2P2O10:Eu2+,Mn2+. When Ba2+is introduced in Sr2B2P2O10:Eu2+,Mn2+, a green emission band appears and white light is obtained. The results indicate that Sr2B2P2O10:Eu2+,Mn2+,Ba2+is an efficient “single host lattice phosphor” for solid-state lighting technology using a UV light emitting diode to generate white light.