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Quantum dot ligand exchange method and device of same

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

Active Publication Date: 2018-07-10
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 of same
  • Quantum dot ligand exchange method and device of same
  • Quantum dot ligand exchange method and device of same

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 invention discloses a quantum dot ligand exchange method and device of the same. The method comprises the following steps of providing a quantum dot modified by a first ligand, a second ligand anda first polymer; mixing the quantum dot modified by the first ligand, the second ligand and the first polymer into a solvent; performing first ligand exchange to obtain a quantum dot modified by thesecond ligand, wherein the first polymer contains a first functional group; under the same condition, the first functional group can take a first chemical reaction with the first ligand and cannot react with the second ligand. According to the technical scheme provided by the embodiment, the ligand exchange degree is greatly improved by using the scheme of removing the original ligand by a chemical bond; the technical problem that the complete exchange cannot be realized by relying on the strong and weak effects is solved.

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 Applications(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