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Zinc oxide nanocrystal, preparation method thereof, nanocrystal composition containing zinc oxide nanocrystal and quantum dot light emitting device

A technology of zinc oxide nanocrystals and compounds, applied in nanotechnology for information processing, nanotechnology for materials and surface science, nanotechnology, etc., can solve problems such as poor stability of zinc oxide nanocrystals, and achieve difficult crystallization , good dispersibility, good solubility and dispersibility effect

Active Publication Date: 2019-03-22
NANJING TECH CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The main purpose of the present invention is to provide a zinc oxide nanocrystal, its preparation method, a nanocrystal composition comprising it and a quantum dot light-emitting device, so as to solve the problem of poor stability of the zinc oxide nanocrystal in the prior art

Method used

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  • Zinc oxide nanocrystal, preparation method thereof, nanocrystal composition containing zinc oxide nanocrystal and quantum dot light emitting device
  • Zinc oxide nanocrystal, preparation method thereof, nanocrystal composition containing zinc oxide nanocrystal and quantum dot light emitting device
  • Zinc oxide nanocrystal, preparation method thereof, nanocrystal composition containing zinc oxide nanocrystal and quantum dot light emitting device

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preparation example Construction

[0042] In the second typical embodiment of the present application, a method for preparing any one of the above-mentioned zinc oxide nanocrystals is provided, the preparation method including: Step S1, using a solution method to prepare a solution of initial zinc oxide nanocrystals, the initial zinc oxide nanocrystals The surface of the crystal has a first ligand; step S2, adding siloxane to the solution to replace the first ligand to obtain zinc oxide nanocrystals, wherein the siloxane is selected from any of the compounds shown in the following formula II kind:

[0043]

[0044] A is selected from methyl, ethyl or propyl; D 1 、D 2 and D 3 are independently selected from C 1～3 Alkoxyl, C 1～8 Alkyl, C 1～8 Acrylate alkyl, C 1～8 Hydroxyalkyl, C 1～8 Amidoalkyl, C 1～8 Alkyl carboxylate or C 1～8 ether alkyl.

[0045] By improving the existing zinc oxide nanocrystal preparation steps, after the initial zinc oxide nanocrystal is formed, the siloxane shown in formula II i...

Embodiment 1

[0066] Dissolve 1mmol of zinc acetate dihydrate in 30ml of DMSO (dimethyl sulfoxide), stir at 100°C for 1h and cool to 30°C, then add dropwise 2mmol of 25% TMAH (tetramethylammonium hydroxide) in methanol , continue to stir for 1h, then add 0.2mmol siloxane (dimethyl-Si-dimethoxy) and stir for 10min, adjust the pH to 8 with KOH, raise the temperature to 60°C for 24h, the product is mixed with ethyl acetate and A solid was obtained after purification with a mixed solvent with acetone volume ratio of 1:3.

Embodiment 2

[0068] Dissolve 1mmol anhydrous zinc acetate in 30ml DMSO (dimethyl sulfoxide), stir at 100°C for 1h and cool to 30°C, then add 2mmol 25% TMAH (tetramethylammonium hydroxide) ethanol solution dropwise , continue to stir for 1h, then add 20mmol siloxane (diethyl-Si-diethoxy) and stir for 30min, adjust the pH to 10 with NaOH, raise the temperature to 110°C for 1h, and the product is mixed with ethyl acetate and acetone A solid was obtained after purification with a mixed solvent with a volume ratio of 1:3.

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Abstract

The invention provides a zinc oxide nanocrystal, a preparation method thereof, a nanocrystal composition containing the zinc oxide nanocrystal and a quantum dot light emitting device. The zinc oxide nanocrystal includes a zinc oxide nanocrystal body and a siloxane ligand coated on the surface of the zinc oxide nanocrystal body, wherein the zinc oxide nanocrystal body is Y, the zinc oxide nanocrystal is selected from any of the compounds shown in a formula defined in the description, B1, B2 and B3 are one respectively and separately selected from the following: a formula defined in the description, C1-8 alkyl, C1-8 hydroxyalkyl, C1-8 carboxylic acid alkyl and C1-8 ether alkyl; n range from 1 to 20000, and R1 and R2 are one respectively and separately selected from the C1-8 hydroxyalkyl. Thezinc oxide nanocrystal solves a problem of poor stability of the zinc oxide nanocrystal in the prior art.

Description

technical field [0001] The invention relates to the field of quantum dot light-emitting devices, in particular to a zinc oxide nanocrystal, a preparation method thereof, a nanocrystal composition containing the same, and a quantum dot light-emitting device. Background technique [0002] ZnO is an important electron transport material in QLED light-emitting diodes and has excellent electrical properties. The solution zinc oxide synthesized by sol-gel method has the characteristics of low temperature, environmental protection, economy and is suitable for film formation by solution method. However, due to the small particle size and large specific surface area, the zinc oxide solution is unstable and easy to coagulate and grow. , It is sensitive to air after film formation, and it is easy to crystallize and lose nanometer characteristics at high temperature. [0003] In the prior art, in order to improve its stability, a common method is to select a suitable surface ligand to ...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/54B82Y10/00B82Y30/00
CPCB82Y10/00B82Y30/00H10K50/165H10K2102/101
Inventor 高远谢松均彭军军
Owner NANJING TECH CORP LTD
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