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A kind of preparation method of CDS-coated inorganic perovskite nanomaterials and its products and applications

A nanomaterial, inorganic calcium technology, applied in the field of nanoparticles, can solve the problems that are not conducive to the application of light-emitting diodes, weak stability of perovskite quantum dots, etc., and achieve the effect of high stability, good dispersion, and uniform size

Active Publication Date: 2020-01-03
重庆纳鼎光电科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Inorganic perovskite nanomaterials (CsPbX 3 , X=Cl, Br, I) is a new type of functional material, which has special properties in light-emitting diodes, solar cells, photodetectors, etc., and is widely used in the field of optoelectronic devices. Perovskite prepared by thermal injection method Quantum dots were first reported on the American Chemical Society’s Nano Letters (Nano Lett., 2015, 15(6), 3692), but the perovskite quantum dots prepared by this method are weak in stability and fluoresce when in contact with water. will gradually quench
And perovskite quantum dots have obvious scintillation, which is not conducive to its application in light-emitting diodes

Method used

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  • A kind of preparation method of CDS-coated inorganic perovskite nanomaterials and its products and applications
  • A kind of preparation method of CDS-coated inorganic perovskite nanomaterials and its products and applications
  • A kind of preparation method of CDS-coated inorganic perovskite nanomaterials and its products and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1 Preparation of CdS-coated inorganic perovskite nanomaterials

[0037] (1) In the environment of mechanical stirring and continuous nitrogen, mix 383mg of cadmium oxide with 3.8ml of oleic acid and 3.8ml of octadecene, heat to 240°C and mix and stir for 1 hour, then cool down to 110°C and mix and stir for 30 minutes, Obtained cadmium oleate solution;

[0038] (2) Take 1ml of cadmium oleate solution and add 12.8mg of sulfur powder, 0.4ml of oleylamine and 4ml of octadecene to obtain a mixed solution of cadmium oleate-sulfur powder;

[0039] (3) Mix 100mg of cesium carbonate with 4ml of octadecene and 0.6ml of oleic acid, and stir at 120°C for 1 hour;

[0040] (4) Mix 69mg of lead bromide with 5ml of octadecene, stir at 120°C for 1 hour, then raise the temperature to 150°C, inject 0.5ml of oleic acid and 0.5ml of oleylamine successively, stir for 3 minutes, inject The mixture of 0.4ml cesium carbonate, octadecene and oleic acid can give CsPbBr 3 solution;

[...

Embodiment 2

[0045] Example 2 Preparation of CdS-coated inorganic perovskite nanomaterials

[0046] (1) Under the environment of mechanical stirring and continuous nitrogen, mix 383mg of cadmium oxide with 3.8ml of oleic acid and 3.8ml of octadecene, heat to 210°C and mix and stir for 1 hour, then cool down to 110°C and mix and stir for 30 minutes, Obtained cadmium oleate solution;

[0047] (2) Take 1ml of cadmium oleate solution and add 16mg of sulfur powder, 0.4ml of oleylamine and 4ml of octadecene to obtain a mixed solution of cadmium oleate-sulfur powder;

[0048] (3) Mix 105 mg of cesium carbonate with 4.5 ml of octadecene and 0.7 ml of oleic acid, and stir at 120° C. for 1 hour;

[0049] (4) Mix 73.4mg of lead bromide with 5ml of octadecene, stir at 120°C for 1 hour, then raise the temperature to 150°C, inject 0.5ml of oleic acid and 0.5ml of oleylamine successively, and stir for 3 minutes, Inject 0.4ml of a mixture of cesium carbonate, octadecene and oleic acid to obtain CsPbBr ...

Embodiment 3

[0052] Example 3 Preparation of CdS-coated inorganic perovskite nanomaterials

[0053] (1) Under the environment of mechanical stirring and continuous nitrogen, mix 383mg of cadmium oxide with 3.8ml of oleic acid and 3.8ml of octadecene, heat to 260°C and mix and stir for 1 hour, then cool down to 110°C and mix and stir for 30 minutes, Obtained cadmium oleate solution;

[0054] (2) Take 1ml of cadmium oleate solution and add 9.6mg of sulfur powder, 0.4ml of oleylamine and 4ml of octadecene to obtain a mixed solution of cadmium oleate-sulfur powder;

[0055] (3) Mix 100mg of cesium carbonate with 3.7ml of octadecene and 0.5ml of oleic acid, and stir at 120°C for 1 hour;

[0056] (4) Mix 71mg of lead bromide with 5ml of octadecene, stir at 120°C for 1 hour, then raise the temperature to 150°C, inject 0.5ml of oleic acid and 0.5ml of oleylamine successively, stir for 3 minutes, inject The mixture of 0.4ml cesium carbonate, octadecene and oleic acid can give CsPbBr 3 solution; ...

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Abstract

The invention relates to a CdS-coated inorganic perovskite nanometer material preparation method, which comprises: mixing cadmium oxide, oleic acid and octadecene in a continuous nitrogen environment, carrying out a heating reaction to obtain a cadmium oleate solution, adding octadecene and sulfur powder to obtain a cadmium oleate-sulfur powder solution, adding the cadmium oleate-sulfur powder solution to CsPbX3 (x is Cl, Br and I) in a dropwise manner, carrying out a reaction, and carrying out centrifugation to obtain the CdS-coated inorganic perovskite nanometer material. According to the present invention, the CdS-coated inorganic perovskite nanometer material prepared through the method has high stability, wherein the fluorescence cannot be quenched when the material contacts water; and the CdS-coated inorganic perovskite nanometer material has nonflickering property, and the fluorescence intensity trajectory cannot change greatly, wherein the properties are important in the applications of light-emitting diodes.

Description

technical field [0001] The invention belongs to the technical field of nanoparticles, and relates to a preparation method of a CdS-coated inorganic perovskite nanometer material and its product and application. Background technique [0002] Inorganic perovskite nanomaterials (CsPbX 3 , X=Cl, Br, I) is a new type of functional material, which has special properties in light-emitting diodes, solar cells, photodetectors, etc., and is widely used in the field of optoelectronic devices. Perovskite prepared by thermal injection method Quantum dots were first reported on the American Chemical Society’s Nano Letters (Nano Lett., 2015, 15(6), 3692), but the perovskite quantum dots prepared by this method are weak in stability and fluoresce when in contact with water. will be gradually quenched. And perovskite quantum dots have obvious scintillation, which is not conducive to its application in light-emitting diodes. In recent years, CsPbX 3 Nanomaterials have attracted the attent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/66B82Y20/00B82Y30/00B82Y40/00H01L31/0264H01L31/0296H01L31/032H01L33/26
CPCB82Y20/00B82Y30/00B82Y40/00C09K11/02C09K11/665H01L31/0264H01L31/0296H01L31/032H01L33/26
Inventor 唐孝生李诗琪臧志刚刘洪均
Owner 重庆纳鼎光电科技有限公司