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Metal nanoparticles-doped gadolinium acid calcium green light luminescent material and preparation method thereof

A technology of metal nanoparticles and luminescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of low luminous efficiency of luminescent materials, and achieve the effects of improved luminous efficiency, less stringent process conditions, high color purity and brightness

Inactive Publication Date: 2014-09-24
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] Among the fluorescent materials currently used in field emission devices, CaGd 4 o 7 Doped rare earth ions emit light, which has the characteristics of good stability. However, the luminous efficiency of its luminescent materials is not high at present, and needs to be improved.

Method used

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  • Metal nanoparticles-doped gadolinium acid calcium green light luminescent material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: CaGd 3.7 o 7 :Tb 0.3 ,Au 1×10ˉ2 :

[0025] Preparation of Au-containing nanoparticle sol: Weigh 48.4 mg of chloroauric acid (AuCl 3 ·HCl·4H 2 O) be dissolved in the deionized water of 10mL; Under the condition of magnetic stirring, 14mg sodium citrate and 6mg cetyltrimethylammonium bromide are dissolved in the above-mentioned chloroauric acid solution; Weigh 1.9mg sodium borohydride Dissolve in 10 mL of deionized water to obtain a concentration of 5 × 10 -3 mol / L sodium borohydride solution; weigh 17.6mg of ascorbic acid and dissolve it in 10mL of deionized water to obtain a concentration of 1×10 -2 mol / L ascorbic acid solution; under the condition of magnetic stirring, first add 5mL of the above-mentioned sodium borohydride solution to the above-mentioned chloroauric acid solution, after reacting for 5min, then add 5mL of the above-mentioned ascorbic acid solution to the above-mentioned chloroauric acid solution, and continue the reaction 20min, the c...

Embodiment 2

[0028] Example 2: CaGd 3.999 o 7 :Tb 0.001 ,Pt 5×10ˉ3 :

[0029] Containing the preparation of Pt nanoparticle sol: take by weighing 25.9mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in 17mL of deionized water; under the condition of magnetic stirring, 400mg sodium citrate and 600mg sodium dodecylsulfonate are dissolved in the above-mentioned chloroplatinic acid solution; 1.9mg sodium borohydride is weighed and dissolved in 10mL deionized water to obtain a concentration of 5 x 10 -3 mol / L sodium borohydride solution; at the same time prepare 10mL concentration of 5×10 -2 mol / L hydrazine hydrate solution; under the condition of magnetic stirring, first add 0.4mL of the above-mentioned sodium borohydride solution dropwise to the above-mentioned chloroplatinic acid solution, after reacting for 5min, then add 2.6mL of the above-mentioned hydrazine hydrate solution to the above-mentioned chloroplatinic acid solution Hydrazine solution, continue to react for 40min...

Embodiment 3

[0032] Example 3: CaGd 3.92 o 7 :Tb 0.08 , Ag 2.5×10ˉ4 :

[0033] Preparation of Ag nanoparticles sol: weigh 3.4 mg silver nitrate (AgNO 3 ) was dissolved in 18.4mL of deionized water; under the condition of magnetic stirring, 42mg of sodium citrate was dissolved in the above silver nitrate solution; 5.7mg of sodium borohydride was weighed and dissolved in 10mL of deionized water to obtain a concentration of 1.5×10 -2 mol / L sodium borohydride solution; under the condition of magnetic stirring, add 1.6mL of the above-mentioned sodium borohydride solution to the above-mentioned silver nitrate solution at one time, and continue to react for 10min to obtain 20mL of Ag nanoparticles with a concentration of 1×10 -3 mol / L of sol.

[0034] Weigh 0.6563g Ca(NO 3 ) 2 , 5.3818g Gd(NO 3 ) 3 and 0.1104g Tb(NO 3 ) 3 Put it in a container, then add 50mL of a mixed solution of ethanol and water with a volume ratio of 8:1, add 9.6060g of citric acid and 5.4g of polyethylene glycol 1...

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Abstract

The invention belongs to the luminescent material field, and discloses a metal nanoparticles-doped gadolinium acid calcium green light luminescent material and a preparation method thereof. A general chemical formula of the luminescent material is CaGd4-xO7: Tbx, My, wherein, M is at least one of Ag, Au, Pt, Pd and Cu metal nanoparticles, the value range of x is greater than 0 and is less than or equal to 0.3, y is mole ratio of M to CaGd4-xO7: Tbx, and the value range of y is greater than 0 and less than or equal to 1*10<-2>. In the metal nanoparticles-doped gadolinium acid calcium green light luminescent material, by introducing M nanoparticles, luminescence efficiency of the gadolinium acid calcium green light luminescent material can be greatly increased under same excitation condition, wavelength of emitted light is not changed, purity and brightness of the stimulated emitted light are enhanced, and the morphology is controllable.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a calcium gadonate green light luminescent material doped with metal nanoparticles and a preparation method thereof. Background technique [0002] Field Emission Display (FED) is a flat panel display technology with great development potential. The working voltage of the field emission display device is lower than that of the cathode ray tube (CRT), usually less than 5kV, but the working current density is relatively large, generally in the range of 10-100μA·cm -2 . Therefore, the requirements for luminescent powders used in field emission displays are higher, such as better chromaticity, higher luminous efficiency at low voltages, and no brightness saturation at high current densities. At present, the research on luminescent powder for field emission display mainly focuses on two aspects: one is to use and improve the existing luminescent powder for cathode ray tube; the o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 周明杰王荣
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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