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Nano-crystal fluorescent powder and preparation method thereof

A technology of nanocrystal and phosphor, which is applied in the field of nanocrystal phosphor and its preparation, and core-shell nanocrystal phosphor, which can solve the problems of long time-consuming, complicated operation process, difficulty in large-scale production, etc., and achieve high yield , Large light absorption coefficient and narrow band gap

Active Publication Date: 2012-05-02
ZHIJING NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing hot injection method has the following defects: (1) the operation process is complicated and time-consuming, and it is difficult to achieve large-scale production; (2) usually only colloidal Cu-In-Zn x -S / ZnS and Cu-In-Zn x -Se / ZnS core-shell structure semiconductor nanocrystalline fluorescent material, unable to directly prepare powdered Cu-In-Zn x -S / ZnS and Cu-In-Zn x -Se / ZnS core-shell structure semiconductor nanocrystalline phosphor powder, there is no direct preparation of Cu-In-Zn in the prior art x -S / ZnS and Cu-In-Zn x -Report of Se / ZnS core-shell structure semiconductor nanocrystalline phosphor, wherein, the x≥0

Method used

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  • Nano-crystal fluorescent powder and preparation method thereof
  • Nano-crystal fluorescent powder and preparation method thereof
  • Nano-crystal fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Step 1. Preparation of reaction source

[0055] Add 0.19g of cuprous iodide, 1.16g of indium acetate, 5mL of dodecyl mercaptan and 25mL of octadecene into a 100mL three-neck flask and mix to obtain a mixed solution 1. Heat the mixed solution 1 to 120°C in vacuum and stir for 30min Then add 2.5mL oleic acid, continue to stir at 120°C in vacuum for 30min until it is completely dissolved, then pass in nitrogen gas for 30min, then raise the temperature to 220°C, the solution turns from light yellow to dark red, and react at constant temperature for 1h to obtain the reaction source.

[0056] Step 2, preparation of colloidal solution

[0057] Mix 2.64g of zinc acetate, 10mL of oleylamine and 10mL of octadecene to obtain a cloudy mixed solution 2, heat the mixed solution 2 to 50°C in vacuum and stir for 30 minutes, then pass nitrogen gas for 30 minutes and raise the temperature to 120°C until The turbid mixed solution 2 becomes clear, and the zinc source is prepared; at 220°C...

Embodiment 2

[0063] Step 1. Preparation of reaction source

[0064] Add 0.19g of cuprous iodide, 1.16g of indium acetate, 5mL of dodecyl mercaptan and 25mL of octadecene into a 100mL three-necked flask and mix to obtain a mixed solution 1, and heat the mixed solution 1 to 100°C in vacuum and stir for 40min ; Then add 2.5mL oleic acid, continue to stir at 120°C for 30min until completely dissolved, then pass through nitrogen for 30min, then raise the temperature to 200°C, the solution turns from light yellow to deep red, and react at constant temperature for 1h to obtain the reaction source.

[0065] Step 2, preparation of colloidal solution

[0066] Mix 2.64g of zinc acetate, 10mL of oleylamine and 10mL of octadecene to obtain a cloudy mixed solution 2, heat the mixed solution 2 to 80°C in vacuum and stir for 30 minutes, then pass nitrogen gas for 30 minutes, and then raise the temperature to 140°C, The zinc source is prepared until the turbid mixed solution 2 becomes clear; the zinc sour...

Embodiment 3

[0072] Step 1. Preparation of reaction source

[0073] Add 0.19g of cuprous iodide, 1.16g of indium acetate, 5mL of dodecyl mercaptan and 25mL of octadecene into a 100mL three-neck flask and mix to obtain a mixed solution 1. Heat the mixed solution 1 to 110°C in vacuum and stir for 60min Then add 2.5mL oleic acid, continue to stir at 120°C for 30min until completely dissolved, then pass nitrogen gas for 30min, then raise the temperature to 230°C, the solution turns from light yellow to deep red, and react at constant temperature for 1h to obtain the reaction source.

[0074] Step 2, preparation of colloidal solution

[0075] Mix 2.64g of zinc acetate, 10mL of oleylamine and 10mL of octadecene to obtain a cloudy mixed solution 2, heat the mixed solution 2 to 100°C in vacuum and stir for 30 minutes, then pass in argon for 30 minutes, and then raise the temperature to 160°C , until the turbid mixed solution 2 becomes clear, the zinc source is prepared; the zinc source is added d...

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Abstract

The invention relates to nano-crystal fluorescent powder and a preparation method thereof. The invention belongs to the technical field of luminescent materials. The nano-crystal fluorescent powder is Cu-In-Znx-E / ZnS, wherein E=S or Se, and x is no smaller than 0. The preparation method comprises steps that: copper salt, indium salt, alkanethiol and octadecene are isolated from oxygen, mixed, andheated; long-chain alkyl organic acid is added to the product, the mixture is isolated from oxygen and is heated, such that a reaction source is obtained; zinc salt, long-chain alkyl organic amine and octadecene are isolated from oxygen, mixed, and heated, such that a zinc source is obtained; when E=S, the zinc source is added to the reaction source, and the mixture is heated, such that a colloidal solution 1 is obtained; when E=Se, selenium powder is dissolved, and an obtained selenium source is added to the reaction source; the mixture is heated, such that a colloidal solution 2 is obtained; the zinc source is added to the colloidal solution 2, and the mixture is heated, such that a colloidal solution 3 is obtained; the colloidal solution 1 or 3 is washed, and is subject to vacuum drying, such that the nano-crystal fluorescent powder is obtained. According to the invention, the nano-crystal fluorescent powder contains no rare earth element; the luminescence wavelength is adjustable;the nano-crystal fluorescent powder can be uniformly dispersed in an organic solvent; and the application range of the nano-crystal fluorescent powder is wide. The preparation method is advantaged inhigh yield, low cost, environment-friendliness, easy operation, and suitability for large-scaled productions.

Description

technical field [0001] The invention relates to a nanocrystalline fluorescent powder and a preparation method thereof, in particular to a nanocrystalline fluorescent powder that does not contain rare earth elements and has the advantages of solution processing, high fluorescence quantum yield, good stability, adjustable luminous wavelength and wide application range. The core-shell type nano crystal phosphor; also relates to a preparation method of the nano crystal phosphor of the present invention which is cheap, environmentally friendly, easy to operate and capable of large-scale production, and belongs to the technical field of luminescent materials. Background technique [0002] With the development of nanotechnology, nanomaterial science has become an indispensable and important field in the development of current material science. In a sense, the progress of nanomaterials research is bound to push many disciplines such as physics, chemistry, biology, and materials to a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/62
Inventor 钟海政陈冰昆邹炳锁
Owner ZHIJING NANOTECH CO LTD
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