Synthesis and luminescent properties of Eu3+ activated Li3Sr2La3(MoO4)8 red emitting phosphors.

Novel Li3Sr2La3-x(MoO4)8: xEu3+ phosphor (x=0.01, 0.03, 0.07 and 0.09 mole %) molybdate red phosphors had been synthesized by using a combustion Method at as temperature 750°C. The phase formation of the samples was investigated by X-ray diffraction measurements. The excitation and emission spectra indicated that this phosphor could be excited effectively by the visible light, and then emitted red light with the peaks located at 617nm. Upon 287 nm excitation, this phosphor show characteristic fluorescence 5D0 → 7FJ (J = 0, 1, 2, 3, 4) of the Eu3+ ions. The electronic transition located at 617 nm corresponding to 5D0 → 7F2 of Eu3+ ions, which is stronger than the magnetic dipole transition located at 593 nm corresponding to 5D0 →7F1 of Eu3+ ions. Different pathways involved in emission process have been studied. Concentration quenching has been observed for Eu3+ concentration 7%. Eu3+ doped Li3Sr2La3-x(MoO4)8: Eu3+ is a promising phosphor for applications in displays and optical devices. [ABSTRACT FROM AUTHOR]