Study of Photoluminescence Properties of Li2M (MoO4)2:Yb3+ (M= Ca, Sr) Phosphor

Yb3+-doped Li2M (MoO4)2 (M= Ca, Sr) phosphors have been with successfully synthesized by using combustion synthesis method at 750 °C. The phases of prepared phosphors were confirmed by X-ray diffraction pattern and luminescent properties of phosphor materials were systematically studied. As a result of host absorption of Li2M(MoO4)2 (M= Ca, Sr), a broad excitation band ranging from 200 to 400 nm is recorded when Yb3+ emission was observed, photoluminescence spectra measured suggests the efficient energy transfer from host to Yb3+ ions. Upon ultraviolet excitation, an intense near-infrared emission of Yb3+ (2F5/2 → 2F7/2) is observed in Li2M (MoO4)2: Yb3+ (M= Ca, Sr). All the results indicate that Yb3+ doped Li2M(MoO4)2 (M= Ca, Sr)crystal can serve as UV excited phosphor that is a promising candidate as an associated application for solid state laser.