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Preparation method and application in luminescent element thereof of CuInS2-ZnS/ZnSe/ZnS semiconductor quantum dots with core-shell structure

A cuins2-zns, core-shell structure technology, applied in the direction of semiconductor devices, luminescent materials, chemical instruments and methods, etc., can solve the problems that cannot meet the needs of diodes, and achieve the effect of low cost, high yield, and saturated colors

Inactive Publication Date: 2011-06-08
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the luminous wavelength and fluorescence intensity of the nanoparticles synthesized by these methods need to be further improved, and cannot meet the requirements of diode luminescent materials.

Method used

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  • Preparation method and application in luminescent element thereof of CuInS2-ZnS/ZnSe/ZnS semiconductor quantum dots with core-shell structure
  • Preparation method and application in luminescent element thereof of CuInS2-ZnS/ZnSe/ZnS semiconductor quantum dots with core-shell structure
  • Preparation method and application in luminescent element thereof of CuInS2-ZnS/ZnSe/ZnS semiconductor quantum dots with core-shell structure

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Experimental program
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Effect test

Embodiment 1

[0036] Put 2mL of the above original solution into a 10mL three-neck flask, and then pass through N 2 Remove the air in the three-necked flask, and immerse the three-necked flask in an oil bath preheated to 250°C, react for 60s, and DECZn decomposes into ZnS. The excess sulfur reacts further with copper ions and indium ions to obtain a ZCIS alloy colloidal solution. The whole solution is clear red or brown. Dissolve ZnO in a mixed solution of oleic acid and octadecene, and dissolve selenium powder in tributylphosphine. These two solutions were added to the ZCIS colloidal solution to react to obtain CuInS 2 -ZnS / ZnSe single-layer shell quantum dot colloidal solution, and then add DECZn solution to the solution to react to obtain CuInS 2-Colloidal solution of core-shell structure quantum dots of ZnS / ZnSe / ZnS double shell. Remove the oil bath heating device, add n-dodecanethiol to the colloidal solution of the core-shell structure quantum dots of the above-mentioned double sh...

Embodiment 2

[0038] Put 2mL of the above original solution into a 10mL three-neck flask, and then pass through N 2 Remove the air in the three-necked flask, and immerse the three-necked flask in an oil bath preheated to 200°C, react for 100s, and DECZn decomposes into ZnS. The excess sulfur reacts further with copper ions and indium ions to obtain a ZCIS alloy colloidal solution. The whole solution is clear red or brown. Dissolve ZnO in a mixed solution of oleic acid and octadecene, and dissolve selenium powder in tributylphosphine. These two solutions were added to the ZCIS colloidal solution to react to obtain CuInS 2 -ZnS / ZnSe single-layer shell quantum dot colloidal solution, and then add DECZn solution to the solution to react to obtain CuInS 2 -Colloidal solution of core-shell structure quantum dots of ZnS / ZnSe / ZnS double shell. Remove the oil bath heating device, add n-dodecanethiol to the colloidal solution of the core-shell structure quantum dots of the above-mentioned double ...

Embodiment 3

[0040] Put 2mL of the above original solution into a 10mL three-neck flask, and then pass through N 2 Remove the air in the three-necked flask, and immerse the three-necked flask in an oil bath preheated to 160°C to react for 200s, DECZn decomposes into ZnS. The excess sulfur reacts further with copper ions and indium ions to obtain a ZCIS alloy colloidal solution. The whole solution is clear red or brown. Dissolve ZnO in a mixed solution of oleic acid and octadecene, and dissolve selenium powder in tributylphosphine. These two solutions were added to the ZCIS colloidal solution to react to obtain CuInS 2 -ZnS / ZnSe single-layer shell quantum dot colloidal solution, and then add DECZn solution to the solution to react to obtain CuInS 2 -Colloidal solution of core-shell structure quantum dots of ZnS / ZnSe / ZnS double shell. Remove the oil bath heating device, add n-dodecanethiol to the colloidal solution of the core-shell structure quantum dots of the above-mentioned double sh...

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Abstract

The invention discloses a preparation method and application in the luminescent element thereof of CuInS2-ZnS / ZnSe / ZnS semiconductor quantum dots with a core-shell structure, belonging to the technical field of the preparation method of the semiconductor quantum dot. The method comprises the following steps: dissolving the precursors of copper source, zinc source, indium source and sulfur source in nonpolar mixed solvent to perform nucleation and growth under a certain temperature and obtain a CuInS2-ZnS alloy core-ZCIS, then adding zinc source and selenium source alternately in the solution to perform epitaxial growth of ZnSe on the core, then perform epitaxial growth of ZnS to prepare the CuInS2-ZnS / ZnSe / ZnS quantum dots, finally adding polar solvent in the solution, settling, centrifuging, cleaning, and perform vacuum drying to obtain solid quantum dot powder. The prepared quantum dots are 2-8nm and have uniform particle size, controllable emission wavelength and high yield. The quantum dots are used as luminescent material to prepare red, yellow and green quantum dot luminescent elements and the luminescent elements have excellent luminescent property.

Description

technical field [0001] The present invention relates to a CuInS 2 -The method for preparing ZnS / ZnSe / ZnS core-shell structure semiconductor quantum dots and its application in light-emitting devices, belonging to the technical field of preparation methods and application of semiconductor quantum dots. technical background [0002] The size-modulated absorption and emission performance is one of the most attractive properties of semiconductor quantum dots, and it is also the inevitable result of the quantization of its energy level size. Quantum dot fluorescent materials have the characteristics of high color purity, narrow half-peak width, and easy modulation of emission wavelength. The application of core-shell technology and recently developed alloying technology has greatly improved the fluorescence quantum yield and photostability of semiconductor nanocrystals, making it an ideal luminescent material. Broad application space. [0003] Based on II-VI quantum dot lumine...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/88C09K11/62C09K11/02H01L33/06
Inventor 谭占鳌张文庆杨勇平
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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