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I-III-VI multi-component quantum dot preparation method based on ionic-liquid-assisted microwave synthesis, and product prepared according to preparation method

An I-III-VI, ionic liquid technology is applied in the preparation field of ionic liquid-assisted microwave synthesis of I-III-VI group multi-component quantum dots, which can solve the problems of increased cost and toxicity, low quantum dot yield, low reaction temperature, etc. problem, to achieve the effect of increasing the instantaneous nucleation rate, improving the fluorescence performance, and simplifying the preparation process

Inactive Publication Date: 2017-03-15
JINGDEZHEN CERAMIC INSTITUTE
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the use of large amounts of organic solvents increases the cost and toxicity during the synthesis
For this reason, there are also researches and developments using supercritical fluid as the reaction medium, or using water to replace organic solvents. Although the solvent toxicity and production costs have been reduced to a certain extent, the process is still complicated and the control is difficult. , long reaction time and other problems, especially the lower reaction temperature of aqueous phase synthesis compared with organic phase synthesis, which also leads to generally low yield of quantum dots

Method used

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  • I-III-VI multi-component quantum dot preparation method based on ionic-liquid-assisted microwave synthesis, and product prepared according to preparation method
  • I-III-VI multi-component quantum dot preparation method based on ionic-liquid-assisted microwave synthesis, and product prepared according to preparation method
  • I-III-VI multi-component quantum dot preparation method based on ionic-liquid-assisted microwave synthesis, and product prepared according to preparation method

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Embodiment 1

[0027] In this embodiment, a preparation method for ionic liquid-assisted microwave synthesis of group I-III-VI multi-element quantum dots, the steps are as follows:

[0028] (1) Dissolve 0.03mmol copper chloride and 0.03mmol indium chloride of water-soluble metal salt in 60ml deionized water to form a precursor mixture containing metal ions;

[0029] (2) Add 0.6 mmol glutathione, an organic ligand, to the above-mentioned precursor mixture to balance the activity of the metal cation, stir and dissolve, and adjust with NaOH to obtain a mixed solution with a pH value of 9.0;

[0030] (3) Add 0.6 mmol of ionic liquid 1-butyl-3-methylimidazolium tetrafluoroborate to the above mixed solution and mix evenly, then add sodium sulfide with an equimolar number of metal ions to obtain a reaction solution;

[0031] (4) Pour the above reaction solution into a polytetrafluoroethylene liner and place it in a commercially available microwave oven at low heat (120W) for microwave reaction for ...

Embodiment 2

[0034] In this embodiment, a preparation method for ionic liquid-assisted microwave synthesis of group I-III-VI multi-element quantum dots differs from Embodiment 1 in that:

[0035] (1) In the step (1), the water-soluble metal salt is 0.0067mmol copper chloride, 0.0467mmol indium chloride, 0.0067mmol zinc acetate;

[0036] (2) In the step (3), the ionic liquid is 0.012mmol 1-butyl-3 methylimidazolium bromide;

[0037] (3) In the step (4), the microwave reaction time is 40 minutes to obtain a Cu-In-Zn-S quaternary quantum dot solution.

[0038] Such as figure 2 As shown, the multi-element quantum dots of the present embodiment are Cu-In-Zn-S quaternary quantum dots of tetragonal chalcopyrite structure, do not contain other impurity phases, and its particle size is about 4nm (see image 3 ), conforms to the size range of quantum dots, and has good dispersion.

[0039] Such as Figure 4 As shown, this example is based on imidazolium bromide salt ionic liquid, and the obtain...

Embodiment 3

[0041] In this embodiment, a preparation method for ionic liquid-assisted microwave synthesis of group I-III-VI multi-element quantum dots differs from Embodiment 1 in that:

[0042] (1) In the step (1), the water-soluble metal salt is 0.03mmol copper chloride, 0.09mmol indium chloride, 0.3mmol zinc acetate;

[0043] (2) The consumption of organic ligand glutathione in step (2) is 4.2mmol;

[0044] (3) In the step (3), the ionic liquid is 12.6mmol 1-butyl-3 methylimidazolium chloride salt;

[0045] (4) Obtain Cu-In-Zn-S quaternary quantum dot solution.

[0046] Such as Figure 4 As shown, this embodiment is based on imidazolium chloride salt ionic liquid, and the obtained Cu-In-Zn-S quaternary quantum dots have an obvious luminescence peak at 647nm.

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Abstract

The invention discloses an I-III-VI multi-component quantum dot preparation method based on ionic-liquid-assisted microwave synthesis. According to the preparation method, a water-soluble metal salt as a raw material dissolves in deionized water to form metal-ion-containing precursor mixed liquor, quick quantum dot synthesis is achieved through microwave synthesis on the basis of the ionic liquid, and fluorescence properties of quantum dots are improved while the pure-phase multi-component quantum dots are synthesized. The preparation method has the advantages of simplicity in preparation process, easiness in control, high efficiency, quickness and environment protection, and can be applicable to large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of quantum dot materials, in particular to a preparation method for ionic liquid-assisted microwave synthesis of group I-III-VI multivariate quantum dots and the prepared product. Background technique [0002] Quantum dot materials can be used as a new generation of luminescent materials for solid-state lighting and full-color lighting due to their characteristics such as adjustable luminescent wavelength, narrow luminous linewidth, high luminous efficiency, large Stokes shift, and good light, thermal and chemical stability. Flat panel display, so it has a wide range of application prospects. Group I-III-VI multi-component quantum dots are new green fluorescent quantum dot materials researched and developed in recent years. The disadvantages greatly increase the adjustability of optical performance. More importantly, I-III-VI multi-component quantum dots avoid the use of carcinogenic heavy metal elements s...

Claims

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Application Information

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IPC IPC(8): C09K11/62C09K11/84
CPCC09K11/621C09K11/623C09K11/7729
Inventor 陈婷徐彦乔王连军江莞江伟辉刘健敏谢志翔
Owner JINGDEZHEN CERAMIC INSTITUTE
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