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Quantum dot ligand exchange method and device

A ligand exchange and quantum dot technology, applied in chemical instruments and methods, chemical/physics/physicochemical processes, luminescent materials, etc. Influence and other issues, to achieve the effect of improving the degree of ligand exchange, flexibility and operability

Active Publication Date: 2021-03-12
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the ligand exchange of quantum dots mainly uses the strong and weak interactions of the coordination atoms for exchange, but this exchange method brings two problems: firstly, the exchange cannot be completed by relying on the strong and weak interactions, and the remaining ligands are still The application of quantum dots has a great impact; secondly, if the quantum dots themselves are loaded with thiol ligands, it is very difficult to exchange them for other thiol ligands.

Method used

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  • Quantum dot ligand exchange method and device
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  • Quantum dot ligand exchange method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] A method for quantum dot ligand exchange, comprising the following steps:

[0108] Step 101: Provide CdSe / ZnS quantum dots with octyl thiol, tetradecylamine and polyimide with olefins in the side chain, the polyimide structure is as follows:

[0109]

[0110] Step 102: Dissolve 25 mg of CdSe / ZnS quantum dots with octylthiol and 1 ml of tetradecylamine in 1 ml of hexane solution, and pass through the first device filled with the polyimide at a speed of 1 cm / s. At the same time, ultraviolet light is irradiated on the flow-through area to catalyze the click reaction between the sulfhydryl group and the double bond to obtain a CdSe / ZnS quantum dot solution containing tetradecylamine modification, and the solution is precipitated with methanol to obtain tetradecylamine modified CdSe / ZnS quantum dots .

Embodiment 2

[0112] A method for quantum dot ligand exchange, comprising the following steps:

[0113] Step 201: Provide CdSe / ZnS quantum dots with octyl thiol, tetradecylamine and a first polyimide with olefins in the side chain, the first polyimide structure is as follows:

[0114]

[0115] Step 202: Dissolve 25 mg of CdSe / ZnS quantum dots with octyl thiol and 1 ml of tetradecylamine in 1 ml of hexane solution, and pass through the first device filled with the first polyimide at a speed of 1 cm / s. At the same time, ultraviolet light is irradiated on the flow-through area to catalyze the click reaction between the sulfhydryl group and the double bond.

[0116] Step 203: Collect the solution containing the tetradecylamine-modified quantum dots after the reaction in the previous step.

[0117] Step 204: Let the solution containing tetradecylamine-modified quantum dots pass through a second device filled with a second polyimide at a speed of 1 cm / s. The side chain functional group of the...

Embodiment 3

[0121] A method for quantum dot ligand exchange, comprising the following steps:

[0122] Step 301: Provide CdSe / ZnS quantum dots with octyl thiol, tetradecylamine and a first polyimide with olefins in the side chain, the first polyimide structure is as follows:

[0123]

[0124] Step 302: Dissolve 25 mg of CdSe / ZnS quantum dots with octylthiol and 1 ml of tetradecylamine in 1 ml of hexane solution, and pass through the first device filled with the first polyimide at a speed of 1 cm / s. At the same time, ultraviolet light is irradiated on the flow-through area to catalyze the click reaction between the sulfhydryl group and the double bond.

[0125] Step 303: setting channel outlets at different positions of the first device, allowing the solution reacted in the previous step to flow out in batches, and collecting the effluent solutions at different positions.

[0126] Step 304: Let the solutions flowing out of the channel outlets at different positions in the previous step ...

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Abstract

The application discloses a quantum dot ligand exchange method and a device thereof. The method includes: providing a first ligand-modified quantum dot, a second ligand and a first polymer; mixing the first ligand-modified quantum dot, the second ligand and the first polymer in a solvent, and performing the second A ligand exchange to obtain a quantum dot modified by a second ligand; wherein, the first polymer contains a first functional group, and under the same conditions, the first functional group can undergo a first chemical reaction with the first ligand and does not react with the second The ligand reacts. According to the technical solution of the embodiment of the present application, the solution of using chemical bonds to remove the original ligand greatly improves the degree of ligand exchange, and solves the technical problem that cannot be completely exchanged depending on strong and weak interactions.

Description

technical field [0001] The present disclosure relates to the technical field of quantum dot synthesis, in particular to a method and a device for ligand exchange of quantum dots. Background technique [0002] Quantum Dots Light Emitting Doide Display (QLED) is a new type of display technology developed on the basis of organic light emitting displays. Compared with organic light-emitting diode display devices (OLED), QLED has the advantages of narrow luminescence peak, high color saturation, and wide color gamut. At present, the quantum dots used in the preparation of QLED devices mostly use long-chain oily ligands in the synthesis process. Although long-chain oily ligands are beneficial to the stability of quantum dots in the synthesis system, their insulating properties hinder the transport performance of carriers, which will adversely affect the subsequent applications of quantum dots. Therefore, ligand exchange for quantum dots is a necessary process in the preparation ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/02C09K11/88B82Y40/00
CPCB82Y40/00C09K11/025C09K11/883B82Y20/00B01J19/0013B01J19/123B01J19/245B01J19/248B01J2219/0877B01J2219/1203B01J2219/2401
Inventor 梅文海
Owner BOE TECH GRP CO LTD
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