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A fluoride nanocrystal for broadband light amplification and its preparation method and application

A technology of fluoride and nanocrystals, applied in the field of material science, can solve the problems of severe surface scattering and low luminous efficiency, and achieve the effect of broadband light amplification, reduced quenching probability, and uniform and controllable core-shell thickness

Active Publication Date: 2017-05-03
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the surface of luminescent nanocrystals has an incomplete lattice (i.e., a large number of defects), resulting in severe surface scattering and low luminous efficiency.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Measure 400 ul of 0.2 mol / L ytterbium acetate aqueous solution, then measure 1554 ul of 0.2 mol / L ytterbium acetate aqueous solution, 600 ul of 0.02 mol / L erbium acetate aqueous solution (1599 ul of 0.2 mol / L ytterbium acetate solution Aqueous solution, 10ul of 0.02 mol / L thulium acetate aqueous solution; 1580 ul of 0.2 mol / L ytterbium acetate aqueous solution, 200ul of 0.02mol / L holmium acetate aqueous solution; 1580 ul of 0.2 mol / L ytterbium acetate aqueous solution, 200ul of 0.02 mol / L praseodymium acetate aqueous solution), 3ml of oleic acid with a purity of 90%, 7ml of 1-octadecene, placed in a three-necked flask, stirred and heated at 150°C for 30 minutes; after cooling to room temperature, add sodium hydroxide Mix 6ml of ammonium fluoride with methanol, heat up to 50°C, stir and heat in the open for 30 minutes; heat up to 100°C, after methanol volatilizes, pass in nitrogen, continue to heat up to 290°C, keep warm for 1.5h and then cool; Precipitate with ethanol ,...

Embodiment 2

[0027]Measure 400 ul of 0.2 mol / L ytterbium acetate aqueous solution, then measure 1554 ul of 0.2 mol / L ytterbium acetate aqueous solution, 600 ul of 0.02 mol / L erbium acetate aqueous solution (1599 ul of 0.2 mol / L ytterbium acetate aqueous solution , 10ul of 0.02 mol / L thulium acetate aqueous solution; 200 ul of 0.2 mol / L ytterbium acetate aqueous solution, 1580ul of 0.02mol / L holmium acetate aqueous solution; 1590 ul of 0.2 mol / L ytterbium acetate aqueous solution, 100ul of 0.02 mol / L praseodymium acetate aqueous solution), 3ml of oleic acid with a purity of 90%, 7ml of 1-octadecene, placed in a three-necked flask, stirred and heated at 150°C for 30 minutes; after cooling to room temperature, add sodium hydroxide and Mix 6ml of ammonium fluoride methanol solution, raise the temperature to 50°C, stir and heat in the open for 30 minutes; raise the temperature to 100°C, after the methanol volatilizes, pass in nitrogen gas, continue to raise the temperature to 290°C, keep it warm...

Embodiment 3

[0030] Measure 400ul of 0.2 mol / L ytterbium acetate aqueous solution, then measure 1500ul of 0.2 mol / L gadolinium acetate aqueous solution, 1000ul of 0.02 mol / L erbium acetate aqueous solution (1599 ul of 0.2 mol / L gadolinium acetate aqueous solution , 10ul of 0.02 mol / L thulium acetate aqueous solution; 1580 ul of 0.2 mol / L gadolinium acetate aqueous solution, 200ul of 0.02 mol / L holmium acetate aqueous solution; 1580ul of 0.2 mol / L gadolinium acetate aqueous solution, 200ul of 0.02 mol / L of praseodymium acetate aqueous solution), 4ml of oleic acid with a purity of 90%, 6ml of 1-octadecene, placed in a three-necked flask, stirred and heated at 150°C for 30 minutes; after cooling to room temperature, add sodium hydroxide and fluorine Ammonia-methanol mixed solution 7ml, heat up to 50°C, stir and heat in the open for 30 minutes; heat up to 100°C, after the methanol volatilizes, pass in nitrogen, continue to heat up to 280°C, keep warm for 1.5h and then cool; use ethanol to prec...

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Abstract

The invention relates to a fluoride nanometer crystal for wideband optical amplification and a preparation method and application of the fluoride nanometer crystal in the technical field of materials science. According to the fluoride nanometer crystal for the wideband optical amplification, NaYF4: Yb, Re@NaYF4 or NaGdF4: Yb, Re@NaGdF4 nanometer crystal is in a monodisperse nucleocapsid structure. Laser of 980nm is used for exciting the monodisperse nanocrystal, and multi-band near infrared luminescence is produced; the peak position of a luminous peak is freely mixed with the fluoride nanometer crystals at different wave bands, so that the near infrared luminescence using a rare earth ion as a luminescence center is formed, and the effective bandwidth is enlarged. For the nanometer crystal in the monodisperse nucleocapsid structure with the near infrared luminescence is in a hexagonal phase structure, the luminescence center is free from the influence of high energy groups, the lower conversion luminescence efficiency and the luminous intensity are effectively improved, and the fluoride nanometer crystal is extremely suitable for the wideband optical amplification.

Description

technical field [0001] The invention relates to a fluoride nanocrystal used for broadband optical amplification, a preparation method and application thereof, and belongs to the technical field of material science. Background technique [0002] Due to the quantum size effect, small size effect, surface effect and macroscopic tunnel effect of the nanoparticles themselves, affected by these structures, they have different characteristics from the glass system in terms of optics, magnetism and electricity: (1) spectral peaks Broadening, the reduction of particles will increase the degree of disorder of the system; (2) the spectrum will be red-shifted or blue-shifted, and as the particle size decreases, the electronic energy level near the Fermi level will change from quasi-continuous to discrete energy The level phenomenon is manifested as discrete energy levels and presents the Kubo effect, which separates the quantum energy levels of luminescent particles, broadens the effect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/85C09K11/02B82Y20/00
Inventor 周佳佳霍丽丽王怡静陈航宇赵益福王跃锦唐文华徐时清张军杰
Owner CHINA JILIANG UNIV
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