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Quantum dot ink and preparation method thereof

A quantum dot and ink technology, applied in the field of quantum dot ink and its preparation, can solve the problems of low quality of quantum dots, easy blockage of nozzles, poor display effect, etc., and achieve the effect of simple ingredients, ensuring brightness and clarity

Inactive Publication Date: 2017-04-19
厦门世纳芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The quantum dot ink containing these components has complex components, and it is easy to block the nozzle of the printer. When the quantum dot ink is applied to the device, the quantum dot layer formed when the quantum dot ink is applied has very little quality and poor display effect.

Method used

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  • Quantum dot ink and preparation method thereof
  • Quantum dot ink and preparation method thereof
  • Quantum dot ink and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of embodiment 1

[0028] In step 1, the oleic acid ligand in the quantum dot stock solution containing quantum dot CdZnS@ZnSe and the thiol ligand on octyl thiol are heated to 60 ° C under the protection of argon, and the ligand is exchanged by magnetic stirring; in the step In the second step, add 45ml of chloroform to the solution after the ligand exchange to dilute and disperse the quantum dot stock solution, add 75ml of ethanol to promote the precipitation of quantum dots, and carry out heart purification under the condition of 10000r / min to obtain quantum dot precipitation; In step 3, the quantum dot precipitation obtained in step 2 is vacuum-dried to obtain quantum dot powder; in step 4, an equal amount of dried quantum dot powder is mixed with n-hexane solution to obtain quantum dot ink.

[0029] Through the above four steps, in the obtained quantum dot ink, the quantum dot content in the quantum dot reaches 50%, and the viscosity meets the...

Embodiment 2

[0030] The preparation method of embodiment 2

[0031] In step 1, the oleic acid ligand in the quantum dot stock solution containing quantum dots CdZnS@ZnSe@ZnS and the thiol ligand on dodecanethiol are heated to 60°C under the protection of argon, and the ligands are exchanged by magnetic stirring. ; In step 2, add 45ml chloroform to the solution after the ligand exchange to dilute the dispersed quantum dot stock solution, add 75ml ethanol to promote the precipitation of quantum dots, and carry out heart purification under the condition of 10000r / min to obtain quantum dots Dot precipitation; in step three, vacuum-dry the quantum dot precipitation obtained in step two to obtain quantum dot powder; in step four, dry the quantum dot powder and n-octane solution in a mass ratio of 6:4 Mix to get quantum dot ink.

[0032] Through the above four steps, in the obtained quantum dot ink, the quantum dot content in the quantum dot reaches 60%, and the viscosity meets the requirement o...

Embodiment 3

[0033] The preparation method of embodiment 3

[0034] In step 1, the oleic acid ligand and the mercapto ligand of 2-ethyl-hexanethiol in the quantum dot stock solution containing quantum dots CdZnS@ZnSe are heated to 60 ° C under the protection of argon, and the ligands are stirred by magnetic force. Exchange; in step 2, add 60ml of chloroform to the solution after ligand exchange to dilute and disperse the stock solution, add 90ml of acetonitrile to promote the precipitation of quantum dots, and perform centrifugal purification under the condition of 10000r / min to obtain quantum dots Precipitation; in step 3, vacuum-dry the quantum dot precipitation obtained in step 2 to obtain quantum dot powder; in step 4, mix the dried quantum dot powder with cyclohexane solution in a mass ratio of 7:3 , to obtain quantum dot ink.

[0035] Through the above four steps, in the quantum dot ink obtained, the quantum dot content in the quantum dot reaches 70%, and the viscosity meets the req...

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Abstract

The embodiment of the invention provides quantum dot ink and a preparation method thereof and relates to the technical field of quantum dots, wherein the preparation method of the quantum dot ink comprises: carrying out ligand exchange on a quantum dot stock solution and a ligand in the argon shield and under the condition of 50-70 DEG C; transferring the solution obtained by ligand exchange into a centrifugal bottle, adding a precipitation promoting additive and a quantum dot dispersion promoting additive, and carrying out centrifugal purification to obtain a quantum dot precipitate, carrying out vacuum drying on the quantum dot precipitate to obtain quantum dot powder; and mixing the vacuum dried quantum dot powder with a non-polar solvent according to a certain mass ratio to obtain the quantum dot ink. According to the quantum dot ink and the preparation method thereof provided by the invention, the prepared quantum dot ink can be used for an ink-jet printing method, and most of quantum dots are about to be remained after a volatile solvent in the ink is volatilized, so that the requirement for the quantity of current carriers in the quantum dots when a photoelectric device is conducted as well as the brightness and the definition when pictures and characters are imaged are guaranteed.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of quantum dots, in particular to a quantum dot ink and a preparation method thereof. Background technique [0002] Quantum dots are quasi-zero-dimensional nanomaterials, which are composed of a small number of atoms, and the movement of electrons in them is restricted in all directions, so the quantum confinement effect is particularly significant. Therefore, quantum dots can emit light when stimulated by light or electricity, and the emitted light has the following properties: the emission frequency changes with the size of quantum dot nanoparticles, the emission peak is narrow, the luminous quantum efficiency is relatively high, and the ultrahigh light Stability, at the same time, quantum dots can be dispersed in different solvents by adjusting the ligands. Therefore, quantum dots have the characteristics of solution processing, that is, they can be sprayed on different material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/38C09D11/30C09D11/36
CPCC09D11/38C09D11/30C09D11/36
Inventor 纪丽珊魏居富李丹阳张虚谷
Owner 厦门世纳芯科技有限公司
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