Fluoride nanometer crystal for wideband optical amplification and preparation method and application of fluoride nanometer crystal

A fluoride and nanocrystal technology, applied in the field of material science, can solve the problems of low luminous efficiency and serious surface scattering, and achieve the effect of realizing broadband light amplification, reducing the quenching probability, and uniform and controllable size and shape.

Active Publication Date: 2015-03-11
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 respectively measure 1554 ul of 0.2 mol / L ytterbium acetate aqueous solution, and 600 ul of 0.02 mol / L erbium acetate aqueous solution (1599 ul of 0.2 mol / L ytterbium acetate aqueous solution) Aqueous solution, 10 ul of 0.02 mol / L thulium acetate aqueous solution; 1580 ul of 0.2 mol / L ytterbium acetate aqueous solution, 200ul of 0.02 mol / L holmium acetate aqueous solution; 1580 ul of 0.2 mol / L ytterbium acetate aqueous solution, 200ul 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 and heated at 150°C with open stirring for 30 minutes; after cooling to room temperature, add hydroxide 6ml of a methanol mixed solution of sodium and ammonium fluoride, heat up to 50°C with open stirring and heat for 30 minutes; heat up to 100°C, after methanol volatilizes, blow in nitrogen, continue to heat up to 290°C, keep it war...

Embodiment 2

[0027] Measure 400ul of 0.2 mol / L ytterbium acetate aqueous solution, then respectively measure 1554ul of 0.2 mol / L ytterbium acetate aqueous solution, 600ul of 0.02 mol / L erbium acetate aqueous solution (1599 ul of 0.2 mol / L ytterbium acetate aqueous solution ,10 ul of 0.02 mol / L thulium acetate aqueous solution; 200 ul of 0.2 mol / L ytterbium acetate aqueous solution, 1580ul of 0.02 mol / L holmium acetate aqueous solution; 1590 ul of 0.2 mol / L ytterbium acetate aqueous solution, 100ul 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 6ml of methanol mixed solution with ammonium fluoride, heat up to 50°C with open stirring and heat for 30 minutes; heat up to 100°C, after methanol volatilizes, blow in nitrogen, continue to heat up to 290°C, keep for 1.5h and then cool; precipitation with et...

Embodiment 3

[0030] Measure 400ul of 0.2 mol / L ytterbium acetate aqueous solution, and then respectively 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 ,10 ul 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 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 7ml of methanol mixed solution of ammonium fluoride, heated to 50°C with open stirring and heated for 30 minutes; heated to 100°C, after methanol volatilized, bubbling in nitrogen, continue to heat to 280°C, keep for 1.5h and then cool; precipi...

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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 light amplification, a preparation method and application thereof, and belongs to the technical field of materials science. Background technique [0002] Because nanoparticles themselves have quantum size effects, small size effects, surface effects, and macro-tunneling effects, they are affected by these structures, making them have different characteristics from glass systems in terms of optics, magnetism, and electricity: (1) Spectral peaks Broadening, the decrease of particles will increase the degree of disorder of the system; (2) The spectrum is red-shifted or blue-shifted, as the particle size decreases, the electron energy level near the Fermi level changes from quasi-continuous to discrete energy The Kubo effect is manifested as discrete energy levels, which separates the quantum energy levels of luminescent particles, broadens the effective band gap, and blue-shifts the correspondi...

Claims

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Application Information

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Patent Type & Authority Applications(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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