Blue Upconversion Luminescence Properties of La₂(WO₄)₃:Yb³⁺/Tm³⁺Phosphor

Abstract:

Monoclinic La₂(WO₄)₃ nanophosphors codoped with Tm³⁺ and Yb³⁺ ions were synthesized via hydrothermal process followed by heat treatment. Powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize as-prepared samples. The dependences of Yb³⁺/ concentration and laser pumping power on the upconversion emissions were extensively investigated. The results show that upconversion luminescence increases with the Yb³⁺/ concentration and gets its peak at 30 %. The upconversion mechanism and process in the Yb³⁺/Tm³⁺ codoped La₂(WO₄)₃ phosphors were analysed.

• Periodical: Advanced Materials Research (Volumes 399-401)
• Pages: 1020-1025
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.399-401.1020
• Online since: November 2011
• Authors: Jin Sheng Liao, Hang Ying You, Qing Xia Wu, He Rui Wen, Jing Lin Chen, Rui Jin Hong
• Keywords: Blue Upconversion, Hydrothermal Synthesis, La₂(WO₄)₃:Yb³⁺/Tm³⁺

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