Yellow Upconversion Luminescence in Ho³⁺/Yb³⁺ Co-Doped La₂(WO₄)₃ Phosphor

Abstract:

The strong yellow upconversion (UC) light emission has been observed in Ho³⁺/Yb³⁺ co-doped La₂(WO₄)₃ phosphor under the excitation of 980 nm diode laser. The phosphors were synthesized by the traditional solid-state reaction method. The phrase structures of the samples were characterized by X-ray diffraction (XRD). The doping concentration of Yb³⁺ was determined to be 20mol% for the strongest yellow emission. Then, the dependence of UC emission intensity on excitation power density showed that the green and red UC emissions are involved in two-photon process. The possible UC mechanisms for the strong yellow emission were also investigated.

• Periodical: Applied Mechanics and Materials (Volumes 401-403)
• Pages: 758-761
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.401-403.758
• Online since: September 2013
• Authors: Jia Yue Sun, Bing Xue, Guang Chao Sun, Dian Peng Cui
• Keywords: Luminescence, Rare Earth, Yellow Emitting Phosphor

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DOI: 10.1103/physrevb.61.3337