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Lithium niobate up-conversion luminescent material with core-shell structure and preparation method of lithium niobate up-conversion luminescent material

A technology of luminescent materials and core-shell structure, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low phonon energy, unfavorable up-conversion luminous efficiency, and failure to maintain, achieve excellent performance and improve up-conversion luminous efficiency , the effect of shortening the reaction time

Pending Publication Date: 2021-02-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because lithium niobate as a host material cannot maintain low phonon energy, it is not conducive to the improvement of upconversion luminous efficiency, so its application is limited.

Method used

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  • Lithium niobate up-conversion luminescent material with core-shell structure and preparation method of lithium niobate up-conversion luminescent material
  • Lithium niobate up-conversion luminescent material with core-shell structure and preparation method of lithium niobate up-conversion luminescent material
  • Lithium niobate up-conversion luminescent material with core-shell structure and preparation method of lithium niobate up-conversion luminescent material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038](1) Weigh 0.5351g of lithium hydroxide monohydrate, 1.0359g of niobium pentoxide, 0.1214g of ytterbium nitrate pentahydrate and 0.0399g of erbium nitrate pentahydrate, add them to the reactor, and add 40ml deionized water and 40ml ethylene glycol . Incubate at 270°C for 24h. When the reactor is cooled to room temperature, it is centrifuged to dry and ground. Calcined in a muffle furnace at 1100°C for 2h. When the muffle furnace is cooled to room temperature, the lithium niobate upconversion luminescent material is obtained by grinding again.

[0039](2) Weigh 0.0546g of lithium hydroxide monohydrate, 0.1331g of niobium pentoxide and 0.0123g of ytterbium nitrate pentahydrate, and then weigh 0.1g of the lithium niobate upconversion luminescent material obtained in step (1) into the reactor And add 40ml deionized water and 40ml ethylene glycol. The reaction kettle was sonicated for 30 minutes. Then keep it at 270°C for 24h. When the reactor is cooled to room temperature, it is centr...

Embodiment 2

[0042](1) Weigh 0.5351g of lithium hydroxide monohydrate, 1.0359g of niobium pentoxide, 0.1214g of ytterbium nitrate pentahydrate and 0.0399g of erbium nitrate pentahydrate, add them to the reactor, and add 40ml deionized water and 40ml ethylene glycol . Incubate at 270°C for 24h. When the reactor is cooled to room temperature, it is centrifuged to dry and ground. The lithium niobate up-conversion luminescent material is obtained.

[0043](2) Weigh 0.0546g of lithium hydroxide monohydrate, 0.1331g of niobium pentoxide and 0.0123g of ytterbium nitrate pentahydrate, and then weigh 0.1g of the lithium niobate material obtained in step (1) into the reactor, and Add 40ml deionized water and 40ml ethylene glycol. The reaction kettle was sonicated for 30 minutes. Then keep it at 270°C for 24h. When the reactor is cooled to room temperature, it is centrifuged to dry and ground. Calcined in a muffle furnace at 1100°C for 2h. When the muffle furnace is cooled to room temperature, it is ground ag...

Embodiment 3

[0046](1) Weigh 0.5351g of lithium hydroxide monohydrate, 1.0359g of niobium pentoxide, 0.1214g of ytterbium nitrate pentahydrate and 0.0399g of erbium nitrate pentahydrate, add them to the reactor, and add 40ml deionized water and 40ml ethylene glycol . Incubate at 270°C for 24h. When the reactor is cooled to room temperature, it is centrifuged to dry and ground. Calcined in a muffle furnace at 800°C for 2h. When the muffle furnace is cooled to room temperature, it is ground again to obtain a lithium niobate upconversion luminescent material.

[0047](2) Weigh 0.0546g of lithium hydroxide monohydrate, 0.1331g of niobium pentoxide and 0.0123g of ytterbium nitrate pentahydrate, and then weigh 0.1g of the lithium niobate upconversion luminescent material obtained in step (1) into the reactor And add 40ml deionized water and 40ml ethylene glycol. The reaction kettle was sonicated for 30 minutes. Then keep it at 270°C for 24h. When the reactor is cooled to room temperature, it is centrifug...

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Abstract

The invention belongs to the technical field of up-conversion / down-conversion luminescent materials. According to the lithium niobate up-conversion luminescent material with the core-shell structure provided by the invention, the inner core and the shell layer are rare earth element doped lithium niobate luminescent materials, so that luminescent centers exposed on the surfaces of particles can beeffectively passivated, and the up-conversion luminescent efficiency is improved. Besides, rare earth ions in the shell layer can be used for down-conversion, invisible light in an ultraviolet regionis converted into visible light, the absorption spectrum of the rare earth ions in the solar cell is expanded, and the application range of the rare earth ions in the solar cell is further expanded;and the lithium niobate up-conversion luminescent material with the core-shell structure has high conversion luminescent efficiency, can achieve up- and down-convertion, also has ferroelectric piezoelectric characteristics, and provides more excellent performance for the use of the lithium niobate up-conversion luminescent material in an integrated device. The preparation method is simple to operate and short in reaction period.

Description

Technical field[0001]This application belongs to the technical field of up-conversion / down-conversion luminescent materials, and in particular relates to a lithium niobate up-conversion luminescent material with a core-shell structure and a preparation method thereof.Background technique[0002]Up-conversion luminescent material is a material that can convert low-energy photons to high-energy photons, and exhibits unique luminescence characteristics. Compared with traditional organic dyes, up-conversion luminescent materials have the advantages of low cytotoxicity, high chemical stability, no fluorescence background interference of biological tissues, and less light damage to biological tissues. The above has high attractiveness, and hope to become a new generation of luminescent biological probe.[0003]In order to prepare up-conversion luminescent materials with excellent performance, the choice of matrix is ​​particularly important. The up-conversion luminescence process of rare eart...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/67
CPCC09K11/02C09K11/7769Y02B20/00
Inventor 钱艳楠杨哲唐巽泽唐佳乐徐明光张海燕
Owner GUANGDONG UNIV OF TECH
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