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Preparation method of zinc oxide base red light nano material

A nano-material, zinc oxide-based technology, applied in the field of nano-materials, can solve the problems of low luminous efficiency of ZnO, large concentration quenching, difficult application, etc., and achieve the effect of uniform shape, uniform distribution and good crystallinity

Inactive Publication Date: 2012-05-09
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the erbium ion (Er 3+ ) has low solid solubility and is greatly affected by concentration quenching, resulting in low luminous efficiency of erbium-doped ZnO, which is difficult for practical application

Method used

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  • Preparation method of zinc oxide base red light nano material
  • Preparation method of zinc oxide base red light nano material
  • Preparation method of zinc oxide base red light nano material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Get 5mmol of zinc acetate (Zn(Ac) 2 2H 2 O) and 0.25 mmol of cobalt acetate (Co(Ac) 2 4H 2 O) After dissolving in 100ml of absolute ethanol, add 40ml of ethanol solution of sodium hydroxide dropwise to this solution (the concentration of sodium hydroxide is 0.8mol / L; the dripping speed is 2ml / minute), and continue to drip while adding Stir until the solution turns a solid blue color. Finally, 35ml of polyethylene glycol was added, and after a little stirring, the above solution was transferred into a high-temperature and high-pressure reactor (based on a filling degree of 75%-80%). Seal the reaction kettle, place it in an environment of 140°C, take it out after 16 hours of heat preservation, remove the waste liquid in the reaction kettle, take the sediment in it, wash it with deionized water for 8 to 10 times, and dry the obtained green The powder is zinc oxide nanorods with a cobalt doping content of 5%. Its transmission electron microscope morphology and EDS ener...

Embodiment 2

[0023] Get 5mmol of zinc acetate (Zn(Ac) 2 2H 2 O) and 0.125 mmol of cobalt acetate (Co(Ac) 2 4H 2 O) After dissolving in 100ml of absolute ethanol, add 40ml of ethanol solution of sodium hydroxide dropwise to this solution (the concentration of sodium hydroxide is 0.8mol / L; the dropping speed is 2ml / minute), and continue to carry out while dropping Stir until the solution turns a solid blue color. Finally, 35ml of polyethylene glycol was added, and after a little stirring, the above solution was transferred into a high-temperature and high-pressure reactor (based on a filling degree of 75%-80%). Seal the reaction kettle, place it in an environment of 140°C, take it out after 16 hours of heat preservation, remove the waste liquid in the reaction kettle, take the sediment in it, wash it with deionized water for 8 to 10 times, and dry the obtained green The powder is zinc oxide nanorods with a cobalt doping content of 2.5%.

[0024]

Embodiment 3

[0026] Get 5mmol of zinc acetate (Zn(Ac) 2 2H 2 O) and 0.05 mmol of cobalt acetate (Co(Ac) 2 4H 2 O) After dissolving in 100ml of absolute ethanol, add 40ml of ethanol solution of sodium hydroxide dropwise to this solution (the concentration of sodium hydroxide is 0.8mol / L; the dropping speed is 2ml / minute), and continue to carry out while dropping Stir until the solution turns a solid blue color. Finally, 35ml of polyethylene glycol was added, and after a little stirring, the above solution was transferred into a high-temperature and high-pressure reactor (based on a filling degree of 75%-80%). Seal the reaction kettle, place it in an environment of 140°C, take it out after 16 hours of heat preservation, remove the waste liquid in the reaction kettle, take the sediment in it, wash it with deionized water for 8 to 10 times, and dry the obtained green The powder is zinc oxide nanorods with a cobalt doping content of 1%.

[0027] Use the laser of 325nm wavelength to excite ...

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Abstract

The invention belongs to the field of nano material and relates to a cobalt doped zinc oxide red luminescent nano material. A specific technology is as below: (1) mixing zinc acetate and cobaltous acetate according to a molar proportion and dissolving into absolute ethyl alcohol; (2) dropwise adding sodium hydroxide ethanol solution into the mixed solution and stirring continuously till formation of a stable blue solution; (3) adding polyethylene glycol 400 into the mixed solution, pouring into a reaction kettle and insulating for 16 h at 140 DEG C; (4) removing precipitate in the reaction kettle, cleaning by deionized water 8-10 times and drying to obtain a cobalt doped zinc oxide nanometer rod. According to tests on photoluminescence spectrums of zinc oxide nano samples with different cobalt doping contents by Raman spectrometer, it shows that as increasing of the cobalt doping content, red light peak at 687 nm is enhanced substantially.

Description

technical field [0001] The invention belongs to the field of nanometer materials, and relates to a method for preparing a zinc oxide nanometer material emitting red fluorescence, in particular to a method for obtaining a zinc oxide nanometer material emitting light in a red light band through cobalt doping. Background technique [0002] ZnO is a wide bandgap (3.37 eV) direct bandgap semiconductor material. It has the advantages of high exciton recombination energy (60 meV), high quantum luminescence efficiency, low growth temperature, and low price. It is an important luminescent material. Because pure ZnO emits ultraviolet light and green light when excited, the current research on ZnO light-emitting materials mainly focuses on purple, blue, and green light-emitting diodes, lasers and ultraviolet detectors, and few of them emit red light. Materials research. [0003] Traditional red and near-infrared light diodes use aluminum gallium arsenide (AlGaAs) as the light-emittin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/60C01G9/02
Inventor 张跃赵婧闫小琴
Owner UNIV OF SCI & TECH BEIJING
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