Strontium aluminate luminescent material with hollow structure and preparation method thereof

A luminescent material, strontium aluminate technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve problems such as low luminous efficiency and limited light source application, and achieve good luminous performance, Effect of Luminous Efficiency Improvement

Active Publication Date: 2016-08-10
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Strontium aluminate doped with cerium has very good chemical stability and thermal stability, and has potential application value in the field of luminescent materials, but its luminous efficiency is low, which limits its application in light sources

Method used

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  • Strontium aluminate luminescent material with hollow structure and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0030] Fabrication of hollow-structured Sr coated metal nanoparticles 2.99 Al 2 o 6 : Ce 0.01 3+ Cu 1×10 -4:

[0031] Preparation of Cu nanoparticle sol: Weigh 1.6mg of copper nitrate and dissolve it in 16mL of ethanol. After it is completely dissolved, add 2mg of PVP while stirring, and then slowly drop in 1× 10 -3 mol / L sodium borohydride alcohol solution 4mL, continue stirring for 10min to obtain 20mL4×10 -4 mol / L Cu nanoparticle sol.

[0032] Preparation of CCu: Weigh 0.1426g of sucrose and dissolve it in 39.5mL of absolute ethanol to prepare the alcohol solution of sucrose, add 0.5mL of the above sol to the alcohol solution of sucrose to obtain a mixed solution, then transfer the mixed solution into 50mL In a tetrafluoroethylene-lined reaction kettle, cover and tighten, react at 200°C for 5 hours to prepare a solution containing CCu, centrifuge the solution to obtain a solid phase, wash twice with deionized water and absolute ethanol , and dry the solid phase at ...

Embodiment 2

[0037] Fabrication of hollow-structured Sr coated metal nanoparticles 2.8 Al 2 o 6 : Ce 0.2 3+ Au 1×10 -2

[0038] Preparation of Au nanoparticle sol: Weigh 41.2 mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) Dissolve in 10mL of deionized water; when the chloroauric acid is completely dissolved, weigh 14mg of sodium citrate and 6mg of cetyltrimethylammonium bromide, and dissolve them into the chloroauric acid aqueous solution under magnetic stirring Medium; Weigh 3.8mg of sodium borohydride and 17.6mg of ascorbic acid and dissolve them in 10mL deionized water respectively to obtain 10mL concentration of 1×10 -2 mol / L sodium borohydride aqueous solution and 10mL concentration is 1×10 -2 mol / L ascorbic acid aqueous solution; in the environment of magnetic stirring, first add 5mL sodium borohydride aqueous solution to the chloroauric acid aqueous solution, stir and react for 5min, then add 5mL1×10 -2 mol / L ascorbic acid aqueous solution, and then continue to react for 30min...

Embodiment 3

[0043] Fabrication of hollow-structured Sr coated metal nanoparticles 2.96 Al 2 o 6 : Ce 0.04 3+ Ag 2.5×10 -4:

[0044] Preparation of Ag nanoparticles sol: weigh 3.4 mg silver nitrate (AgNO 3 ) into 18.4mL of deionized water; when the silver nitrate is completely dissolved, weigh 42mg of sodium citrate and dissolve it in the silver nitrate aqueous solution under magnetic stirring; weigh 5.7mg of sodium borohydride and dissolve it in 10mL of deionized water, Obtain 10mL concentration as 1.5×10 -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, add 1.6mL1.5×10 -2 mol / L sodium borohydride aqueous solution, and then continue to react for 10min to obtain 20mL Ag content of 1×10 -3 mol / L of Ag nanoparticles sol.

[0045] Preparation of CAg: Weigh 3.003g of glucose and dissolve it in 35mL of absolute ethanol to prepare an alcoholic solution of glucose, add 5mL of the above sol to the alcoholic solution of glucose to obtain a mixed solu...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a strontium aluminate luminescent material with a hollow structure and a preparation method thereof. The general chemical formula of the luminescent material is Sr 3-x al 2 o 6 : Ce x 3+ @M y , among them, @ means wrapping, Sr 3-x al 2 o 6 : Ce x 3+ is the shell, M is the core; M is at least one of Ag, Au, Pt, Pd, Cu metal nanoparticles, the value range of x is 0<x≤0.2, and the value range of y is 0<y≤1×10 -2 . The strontium aluminate luminescent material with a hollow structure provided by the present invention introduces M metal nanoparticles, so that Sr 3-x al 2 o 6 : Ce x 3+ The luminous efficiency of the luminescent material is greatly improved under the same excitation condition, and the wavelength of the emitted light does not change.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a hollow structure strontium aluminate luminescent material and a preparation method thereof. Background technique [0002] White light LED (1ight emitting diodes) has the advantages of high efficiency, long life, small size, fast response, no pollution, energy saving and so on, which has been paid more and more attention. One of the main ways to realize white light is to combine blue GaN chips with yellow YAG:Ce phosphors to produce white light. The disadvantage of this method is the low color rendering index. The use of near-ultraviolet LED chips and red, green, and blue phosphors to form white LEDs has high luminous efficiency, adjustable color temperature, and high color rendering index. It has been widely studied and has become the mainstream of current development. Therefore, LED trichromatic phosphors that can be effectively excited by violet light and near-ultraviol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/64C09K11/02B82Y30/00
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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