CuInS2/ZnS core-shell quantum dots and preparation method thereof

A core-shell quantum dot and quantum dot technology, applied in the field of CuInS2/ZnS core-shell quantum dots and their preparation, can solve the problems of complex synthesis and purification process, low controllability, etc.

Inactive Publication Date: 2017-05-10
TCL CORPORATION
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of above-mentioned deficiencies in the prior art, the object of the present invention is to provide a kind of CuInS 2 / ZnS core-shell quantum dots and their preparation methods aim to solve the problem that existing methods require complicated synthesis and purification processes and low controllability

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  • CuInS2/ZnS core-shell quantum dots and preparation method thereof

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Embodiment 1

[0033] Red luminescent CuInS 2 The preparation steps of / ZnS core-shell quantum dots are as follows:

[0034](1) Preparation of zinc precursor: 60 mg of zinc oxide and 5 mL of oleic acid (Oleicacid) were mixed and heated at 250 °C under an inert gas atmosphere until the zinc oxide was completely dissolved, and then 3 g of octadecene ( 1-octadecene), to obtain the Zn-Zn precursor.

[0035] (2) Preparation of CuInS by cation exchange method 2 / ZnS core-shell quantum dots: In an inert gas atmosphere, the temperature of the zinc precursor was rapidly raised to 220 °C, and then 400 μL of CuInS with a luminescence peak of 590 nm 2 The octadecene (1-Ocatadecene) solution (1 μM) of quantum dots was injected into the zinc precursor and reacted for 75 mins to obtain CuInS 2 / ZnS core-shell quantum dots, and then remove the heating mantle; after the reaction solution is cooled to room temperature, the product is repeatedly dissolved and precipitated with toluene and anhydrous methanol...

Embodiment 2

[0037] Near-infrared Luminescent CuInS 2 The preparation steps of / ZnS core-shell quantum dots are as follows:

[0038] (1) Preparation of zinc precursor: 60 mg of zinc oxide and 7 mL of fatty acid (Stearic acid) were mixed and heated at 250 °C under an inert gas atmosphere until the zinc oxide was completely dissolved, and then 3 g of octadecene ( 1-octadecene), to obtain the zinc precursor.

[0039] (3) Preparation of CuInS by cation exchange method 2 / ZnS core-shell quantum dots: In an inert gas atmosphere, the temperature of the zinc precursor was rapidly raised to 250 °C, and then 200 μL of CuInS with an emission peak of 810 nm 2 The octadecene (1-Ocatadecene) solution (1 μM) of quantum dots was injected into the zinc precursor and reacted for 60 mins to obtain CuInS 2 / ZnS core-shell quantum dots, and then remove the heating mantle; after the reaction solution is cooled to room temperature, the product is repeatedly dissolved and precipitated with toluene and anhydrou...

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Abstract

The invention discloses CuInS2/ZnS core-shell quantum dots and a preparation method thereof. The method comprises the following steps: in an inert gas atmosphere, heating a prepared zinc precursor to 200-270 DEG C, injecting CuInS2 quantum dots into the zinc precursor, reacting for 5-120 minutes, and stopping heating; and after the reaction solution is cooled to room temperature, repeatedly dissolving and precipitating the product, and carrying out centrifugation purification to obtain the CuInS2/ZnS core-shell quantum dots. The environment-friendly CuInS2 alloy quantum dots are converted into the CuInS2/ZnS core-shell quantum dots by the cation exchange technique, thereby implementing the use of the no heavy metal Cd. The composition and crystal lattice of the CuInS2/ZnS core-shell quantum dots can be completed by previously designing the composition and crystal lattice of the CuInS2 quantum dots. In the cation exchange process, the shape and size of the alloy quantum dots are not changed.

Description

technical field [0001] The invention relates to the field of quantum dot synthesis, in particular to a CuInS 2 / ZnS core-shell quantum dots and preparation method thereof. Background technique [0002] In recent years, quantum dots, as a high-energy-efficiency, wide-color-gamut luminescent material, have shown very high application value in many fields, including lighting, display, solar energy conversion, and molecular and cell imaging. Correspondingly, in order to make quantum dots meet the application requirements in various fields, the continuous improvement of quantum dot synthesis methods has enabled the preparation of highly tunable quantum dot materials in terms of size, morphology, spatial orientation, composition, and crystal structure. [0003] However, due to the complexity of wet chemical synthesis of quantum dots, it is difficult for us to achieve precise control of the size, morphology, spatial orientation, composition and crystal structure of quantum dots du...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/62B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/02B82Y20/00B82Y30/00B82Y40/00C09K11/623
Inventor 刘政杨一行曹蔚然钱磊向超宇
Owner TCL CORPORATION
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