The photoluminescent property and optical transition analysis of host sensitized Ca0.5Sr0.5MoO4:Dy3+ phosphor

A series of Dy3+ doped Ca0.5Sr0.5MoO4 phosphors were synthesized by solid state reaction. The structure and the photoluminescent (PL) properties of the as-prepared powders were characterized by X-ray diffraction (XRD), field emission scanning electron microscope and fluorescent spectrophotometry. The analyses on optical transition of Ca0.5Sr0.5MoO4:xDy(3+) phosphors indicate that the broad band of excitation spectrum comes from the charge transmission. The broad band of excitation spectrum matches well with the excitation energy level of Dy3+, indicating the energy transfer from the host to Dy3+. The chromaticity coordinates changed from blue-green to yellow area depending on the Dy3+ concentration. In addition, the main mechanism of the concentration quenching was the electric multiple interaction between Dy3+ ions. (C) 2014 Elsevier B.V. All rights reserved.