A (YbEr)Ta7O 19 Green upconversion luminescent material and preparation method thereof

By preparing (YbEr)Ta7O19 material, the problem of poor chemical stability of β-NaYF4:Er3+/Yb3+ under high temperature environment was solved, realizing a green upconversion luminescent material with high fluorescence intensity and high chemical stability, which is suitable for high temperature environment.

CN122104224APending Publication Date: 2026-05-29DALIAN MARITIME UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
DALIAN MARITIME UNIVERSITY
Filing Date
2026-02-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing β-NaYF4:Er3+/Yb3+ upconversion phosphors exhibit poor chemical stability under high temperature and complex acid-base environments, leading to a decay in luminescence performance and limiting their application expansion. Furthermore, the fluorescence intensity of oxide-based upconversion luminescent materials is far lower than that of fluoride-based materials.

Method used

The preparation method of (YbEr)Ta7O19 green upconversion luminescent material is adopted. After sintering in a resistance furnace at 900-1100°C for 12-60 hours, B2O3 is added as a solvent and acid washing is performed to obtain (YbEr)Ta7O19 material.

Benefits of technology

The prepared (YbEr)Ta7O19 material exhibits pure green upconversion fluorescence under 980nm laser excitation, with an integrated fluorescence intensity 2.44 times that of NaYF4:Er3+/Yb3+, demonstrating high chemical stability and suitability for high-temperature environments.

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Abstract

This invention discloses a (YbEr)Ta7O 19 Green upconversion luminescent material and its preparation method, the preparation method includes the following steps: according to the molar ratio of Yb 3+ Er 3+ Ta 5+ =a:b:c Weigh out raw materials Yb₂O₃, Er₂O₃, and Ta₂O₅, and mix them. Grind the mixed raw materials in a mortar and pestle, then add 1 to 15 times the mass of B₂O₃ and mix it with the raw materials. Heat the mixture at 900-1100 °C. o Sinter at C for 12-60 h; immerse the sintered sample in water for several days, then filter, and finally place it in an oven at 80°C. o Dry at C for 2 hours; then acid-wash the dried sample, followed by filtration and drying to obtain the green upconversion luminescent material (YbEr)Ta7O. 19 The present invention discloses a (YbEr)Ta7O 19 Green upconversion luminescent material, (Yb / Er)Ta7O prepared using B2O3 as solvent. 19 The phosphor, when excited by a 980nm laser, exhibits pure green upconversion fluorescence, with an integrated fluorescence intensity reaching that of NaYF4:Er 3+ / Yb 3+ It is 2.44 times more potent than upconversion phosphors, and the luminescent material oxide prepared by this invention has high chemical stability, and is expected to replace fluorides in optical wavelength conversion applications in the future.
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