3+-activated SrMo x W 1- x O 4 red-emitting phosphors for solid-state lighting and field-emission displays]]>

摘要

AbstractWe fabricated the trivalent Eu3+-activated SrMoxW1-xO4phosphors by a high-temperature solid-state reaction technique. The prepared phosphors were characterized by X-ray diffraction patterns, field-emission scanning electron microscope images, luminescence decay curves, photoluminescence (PL) spectra, and cathodoluminescence (CL) spectra. Under the ultraviolet (UV) illumination, the emissions of Eu3+ions with an intense peak at 615?nm were observed, indicating the Eu3+ions occupied at the low symmetry sites without inversion in host lattices. With the addition of the Mo6+ions, the emission intensity of the studied samples was increased and the optimum result was obtained whenx?=?0.9. The temperature-dependent PL emission spectra were measured to explore the thermal stability of the resultant compounds. The final products emitted visible red emissions with high color purity of 95.1%. The CL spectra revealed that the synthesized compounds also exhibited superior CL performance. These characteristics make the Eu3+-activated SrMoxW1-xO4red-emitting phosphors a promising candidate for UV-based white light-emitting diode and field-emission display applications.Highlights?The SrMoxW1-xO4:0.07Eu3+phosphors were synthesizedviaa solid-state reaction.?The PL intensity is changed under different compositions between W6+and Mo6+ions.?The optimum PL properties were found in the SrMo0.9W0.1O4:0.07Eu3+phosphor.?The studied sample exhibited superior thermal stability and high color purity.?The strong CL characteristics were also observed.]]>