III-V group quantum dots and preparation method thereof

A quantum dot and ion technology, applied in the field of quantum dot synthesis, can solve the problems of small size and wide size distribution, and achieve the effect of improving the size distribution and promoting the growth of large size.

Active Publication Date: 2021-12-31
合肥福纳科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] This application provides a group III-V quantum dot and its preparation method, which can improve the small size and wide size distribution of the existing group III-V quantum dots The problem

Method used

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  • III-V group quantum dots and preparation method thereof
  • III-V group quantum dots and preparation method thereof
  • III-V group quantum dots and preparation method thereof

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preparation example Construction

[0022] In the first aspect, the embodiment of the present application provides a method for preparing group III-V quantum dots, including:

[0023] (1) Reacting the Group III cation precursor with an organic phosphine having a lone pair of electrons in a first solvent to obtain a first solution.

[0024] The inventors of the present application found in research that the reactivity of group V anion precursors is much higher than that of group III cation precursors, and the unbalanced reaction rate leads to wide size distribution and usually smaller size of quantum dots. In the examples of this application, the organic phosphine with a lone pair of electrons has a certain coordination ability with the cations in the group III cation precursor, and the organic phosphine with a lone pair of electrons reacts with the group III cation precursor to produce intermediates. The activity of the intermediate is greater than that of the Group III cation precursor.

[0025] It should be n...

Embodiment 1

[0059] This embodiment provides a method for preparing group III-V quantum dots, the preparation steps of which include:

[0060] S1: 0.72mmol of In(Ac) 3 2.16mmol of oleic acid (OA) was mixed with 3.6mL of 1-octadecene (ODE), and reacted at 200°C for 2h in a nitrogen atmosphere, then cooled to 130°C to obtain the first mixed solution.

[0061] S2: Add 0.05 mM tris(1-adamantyl)phosphine to the first mixed solution obtained in step S1, and stir at a temperature of 130° C. for 0.5 h under a nitrogen atmosphere to obtain a first solution.

[0062] S3: Add 0.36mM tris(trimethylsilyl)phosphine (TMS 3 P) inject into the first solution obtained in step S2, and react at a temperature of 130° C. for 1 h under a nitrogen atmosphere.

[0063] S4: The temperature of the solution obtained in step S3 was raised to 260° C., and reacted for 20 minutes under a nitrogen atmosphere to obtain group III-V quantum dots.

Embodiment 2

[0065] This embodiment provides a method for preparing group III-V quantum dots, the preparation steps of which include:

[0066] S1: 0.72mmol of In(Ac) 3 2.16 mmol of oleic acid (OA) was mixed with 3.6 mL of 1-octadecene (ODE), and reacted at 120° C. for 3 hours in a nitrogen atmosphere, and then cooled to 130° C. to obtain a first mixed solution.

[0067] S2: Add 0.05mM n-butylbis(1-adamantyl)phosphine to the first mixed solution obtained in step S1, and stir at a temperature of 130°C for 0.5h under a nitrogen atmosphere to obtain the first solution .

[0068] S3: 0.36mM Na 3 As is injected into the first solution obtained in step S2, and reacted at a temperature of 130° C. for 1 h under a nitrogen atmosphere.

[0069] S4: The temperature of the solution obtained in step S3 was raised to 240° C., and reacted for 20 minutes under a nitrogen atmosphere to obtain group III-V quantum dots.

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Abstract

The invention discloses III-V group quantum dots and a preparation method thereof, and belongs to the technical field of quantum dot synthesis. The preparation method of the III-V group quantum dots comprises the following steps: reacting a III group cation precursor with organic phosphine with lone pair electrons in a first solvent to obtain a first solution; and mixing the first solution with a V-group anion precursor, reacting to generate a quantum dot core, and growing. The problems that existing III-V group quantum dots are small in size and wide in size distribution can be solved.

Description

technical field [0001] The present application relates to the technical field of quantum dot synthesis, in particular, to a group III-V quantum dot and a preparation method thereof. Background technique [0002] Quantum dots have excellent optical properties. By controlling the size and composition of quantum dots, they can cover the entire visible light region, even including the near-infrared region. With their excellent optical and electrical properties, quantum dots are widely used in cell imaging, fluorescent probes, quantum dot-sensitized solar cells, light-emitting diodes and other fields. [0003] According to different types of materials, quantum dots can be roughly divided into cadmium-based quantum dots and cadmium-free quantum dots that do not contain cadmium. Cadmium-containing substances may cause leakage during the whole process of production and use, and there is a risk of irreversible damage to personnel and the environment. After the European Union furthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/70C09K11/74B82Y20/00
CPCC09K11/70C09K11/7492B82Y20/00
Inventor 蒋畅程陆玲汪鹏生乔之勇
Owner 合肥福纳科技有限公司
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