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Zinc oxide based fluorescent powder and preparation method thereof

A zinc oxide-based, phosphor technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of low luminous intensity of luminescent materials, and achieve the effects of short preparation period, easy production conditions, and few process steps

Inactive Publication Date: 2013-07-24
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Generally, trivalent rare earth ions are doped into the matrix material by high-temperature melting or high-temperature solid-state reaction, because the melting point of the trivalent rare earth ion oxide is much higher than that of ZnO, and the radius and charge of the trivalent rare earth ion are similar to that of ZnO. The group II cations are quite different, so the trivalent rare earth ions can only exist in the grain boundary and it is difficult to effectively enter the ZnO lattice, so that the luminous intensity of the luminescent material is low

Method used

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  • Zinc oxide based fluorescent powder and preparation method thereof
  • Zinc oxide based fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Weigh 0.3398g of chloroauric acid and dissolve it in water to make 1000mL of chloroauric acid solution with a concentration of 0.001mol / L.

[0033]Take by weighing 0.4939g of zinc acetate and 0.1115g of europium nitrate respectively, measure 0.16mL of monoethanolamine and 2.5mL of chloroauric acid solution, and use ethylene glycol methyl ether as a solvent to prepare 50mL of zinc and europium solutions containing 0.05mol / L. After stirring in a water bath at 50°C for 6 hours, a uniform precursor solution was obtained, and then the obtained precursor solution was aged in an oven at 75°C for 75 hours to obtain Zn 0.90 Eu 0.10 O: 0.001 Au colloid.

[0034] Dry the colloid obtained in the previous step in an oven at 100°C for 90 hours, and then place it in a corundum crucible at 600°C for 6 hours to obtain Zn 0.90 Eu 0.10 O: 0.001Au zinc oxide-based phosphor.

[0035] figure 2 It is the luminescence spectrum figure of the zinc oxide-based phosphor powder of the present...

Embodiment 2

[0037] Weigh 0.5179 g of chloroplatinic acid and dissolve in water to prepare 100 mL of chloroplatinic acid solution with a concentration of 0.01 mol / L.

[0038] Weigh 1.4280g of zinc nitrate and 0.0906g of terbium nitrate respectively, measure 1.44mL of diethanolamine and 2.5mL of chloroplatinic acid solution, and use ethylene glycol methyl ether as a solvent to prepare 50mL of zinc and terbium solutions containing 0.1mol / L. After stirring in a water bath at 70°C for 4 hours, a uniform precursor solution was obtained, and then the obtained precursor solution was aged in an oven at 60°C for 90 hours to obtain Zn 0.96 Tb 0.04 O: 0.005Pt colloid.

[0039] Dry the colloid obtained in the previous step in an oven at 200°C for 48 hours, and then place it in a corundum crucible and treat it at 1000°C for 3 hours in the presence of carbon powder to obtain Zn 0.96 Tb 0.04 O: 0.005Pt zinc oxide-based phosphor.

Embodiment 3

[0041] Weigh 1.6987 g of silver nitrate and dissolve it in water to prepare 1000 mL of silver nitrate solution with a concentration of 0.001 mol / L.

[0042] Take by weighing zinc chloride 1.3494g and erbium nitrate 0.0461g respectively, measure triethanolamine 2.64mL and silver nitrate solution 0.2mL, use ethylene glycol methyl ether as solvent to be mixed with the solution of 50mL containing 0.2mol / L zinc and erbium, After stirring in a water bath at 40°C for 8 hours, a uniform precursor solution was obtained, and then the obtained precursor solution was aged in an oven at 50°C for 56 hours to obtain Zn 0.99 Er 0.01 O: 0.00002Ag colloid.

[0043] Dry the colloid obtained in the previous step in an oven at 160°C for 70h, and then place it in a corundum crucible at 1200°C for 0.5h to obtain Zn 0.99 Er 0.01 O: 0.00002Ag zinc oxide-based phosphor.

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Abstract

The invention discloses zinc oxide based fluorescent powder and a preparation method thereof. The chemical formula of the fluorescent powder is Zn1-xRexO:yM, wherein Re is one or two of Eu, Tb, Er and Dy; M is one of Ag, Au, Pt and Pd; y is the molar ratio of M to Zn1-xRexO; x is greater than or equal to 0.001 and less than or equal to 0.10; and y is greater than or equal to 0.00002 and less thanor equal to 0.01. The preparation method comprises the following steps of: preparing fluorescent powder colloid through a sol-gel method; and performing thermal treatment at a high temperature to obtain the zinc oxide-based fluorescent powder. The zinc oxide based fluorescent powder provided by the invention has high luminous intensity; and the preparation method has a simple process and a short preparation period and can be used for preparing a light-emitting material.

Description

technical field [0001] The invention relates to the technical field of luminescent materials, in particular to a zinc oxide-based fluorescent powder and a preparation method thereof. Background technique [0002] ZnO is an excellent direct wide-bandgap semiconductor luminescent material with excellent physical properties. The luminescent properties of the material can be changed by using the 4f-4f transition of trivalent rare earth ions and the quantum effect of ZnO nanocrystals. Therefore, different trivalent rare earth By doping ZnO with ions, nanocrystalline luminescent materials of different colors can be obtained. Generally, trivalent rare earth ions are doped into the matrix material by high-temperature melting or high-temperature solid-state reaction, because the melting point of the trivalent rare earth ion oxide is much higher than that of ZnO, and the radius and charge of the trivalent rare earth ion are similar to that of ZnO. The group II cations are quite diffe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 周明杰吕婷王烨文马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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