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Preparation method of quantum dot film

A quantum dot film and quantum dot technology, applied in the field of quantum dots, can solve problems such as inability to achieve quantum dot cross-linking, and achieve the effects of excellent electrical conductivity and simple preparation method.

Pending Publication Date: 2020-07-07
TCL CORPORATION
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a method for preparing a quantum dot film, aiming at solving the problem that the prior art cannot realize cross-linking between quantum dots in the quantum dot film

Method used

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  • Preparation method of quantum dot film

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Embodiment 1

[0037] Taking CdSe / ZnS oil-soluble quantum dots, ethanedithiol, and octylamine as examples to prepare quantum dot films:

[0038] 1) Preparation of complex molecules: Take 100mmol of ethanedithiol and 150mmol of octylamine, mix and stir at room temperature for a certain period of time, use a separatory funnel to separate excess ethanedithiol and octylamine at room temperature, and then The temperature of the separated solution was raised to 40° C., and separated again using a separatory funnel to obtain a complex molecule of ethanedithiol and octylamine containing only one mercapto group;

[0039] 2) Preparation of quantum dots with complex molecules on the surface: Take 100 mg of CdSe / ZnS quantum dot solution and disperse it into 10 ml of toluene solution, and then take 5 mmol of complex molecules of ethanedithiol and octylamine containing only one mercapto group Adding to the quantum dot mixed solution, stirring at room temperature for 30 minutes to fully exchange, to obtain...

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Abstract

The invention discloses a preparation method of a quantum dot film, which comprises the following steps: carrying out mixed reaction on organic amine and dithiol to generate a complexing product, andseparating from the complexing product to obtain a first complexing molecule in which a first sulfydryl group in the dithiol is combined with an amino group in the organic amine; carrying out ligand exchange on the first complexing molecule and a quantum dot surface ligand, so that the first complexing molecule is combined on the surface of the quantum dot through a second sulfydryl to obtain thequantum dot of which the surface is combined with the first complexing molecule; and depositing the quantum dots of which the surfaces are combined with the first complexing molecules on a substrate,and annealing to obtain the quantum dot film. The preparation method of the quantum dot film provided by the invention is simple and easy to realize, and the prepared quantum dot film can realize quantum dot crosslinking and has excellent electrical conductivity.

Description

technical field [0001] The invention relates to the field of quantum dots, in particular to a method for preparing a quantum dot film. Background technique [0002] Quantum dot nanocrystal is an important nanomaterial, which has a wide range of applications involving quantum dot nano, such as light-emitting diodes, batteries, biology, display, lighting and many other fields. [0003] The application of quantum dots in some aspects will involve the preparation of quantum dot films. For quantum dot films, the electrical conductivity of the film has a great influence on the performance of the device. The main factor is the influence of ligands on the surface of quantum dots. The charge conductivity of the quantum dot film, the long organic ligand on the surface of the quantum dot has a certain hindering effect on the electrical conductivity of the quantum dot film; in order to improve the electrical conductivity of the quantum dot film, cross-linking technology is usually used,...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/88
CPCC09K11/025C09K11/883
Inventor 程陆玲杨一行
Owner TCL CORPORATION
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