Synthesis and luminescence properties of Sm3+-doped La2WyMo2−yO9 orange-red phosphors

• Published in: Physica. B, Condensed matter Vol. 433; pp. 133 - 137
• Main Authors: Deng, Yaomin, Yi, Shuangping, Huang, Jun, Zhao, Weiren, Xian, Jieqiang
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 15.01.2014; Elsevier
• Subjects: Condensed matter; Condensed matter: electronic structure, electrical, magnetic, and optical properties; Emission; Emittance; Exact sciences and technology; La2WyMo2−yO9; Luminescence; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Orange-red emitting; Other solid inorganic materials; Phosphor; Phosphors; Photoluminescence; Physics; Rare earth metals; Sm3; Ultraviolet; White LED; White light; Sm3; Orange-red emitting; Phosphor; La2WyMo2−yO9; White LED; Mo; Doping; Fluorescence; XRD; O; Energy-level transitions; Samarium additions; La; Solid state reaction; W; Excitation spectrum; Chromaticity; Chemical composition; Sm; Lanthanum Molybdenum Tungsten Oxides Mixed
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2013.10.028

La2WyMo2−yO9 phosphors activated with the trivalent rare-earth Sm3+ were synthesized via a traditional solid-state reaction, their structure and luminescence properties were investigated by using X-ray diffractometer and fluorescence spectrophotometer. There were three emission peaks centered at 563, 599, and 646nm corresponding to the 4G5/2→6H5/2, 4G5/2→6H7/2, 4G5/2→6H9/2 transitions of Sm3+ under the 402nm ultraviolet excitation. Investigation on Sm3+ concentration-dependent emission spectra indicated that La1.97WMoO9:3% Sm3+ phosphor exhibited the strongest orange-red emission with a CIE value of (0.5425, 0.4541). Therefore, it is considered to be a new promising orange-red emitting phosphor for white light emitting diode (LED) application.