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Composite quantum dot, quantum dot solid state membrane, and applications thereof

A technology of composite quantum and quantum dots, which is applied in the field of composite quantum dots and quantum dot solid films, can solve the problems of reducing the fluorescence intensity of quantum dots, the inability to prepare quantum dot solid films, and the aggregation of quantum dots, so as to improve the luminous intensity and stability of luminescence consistent, reproducible, and easy-to-operate effects

Inactive Publication Date: 2019-07-09
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a composite quantum dot and its preparation method, aiming to solve the problem that inorganic ions will cause the aggregation of quantum dots and reduce the fluorescence intensity of quantum dots at the same time, resulting in the inability to use inorganic ions to prepare quantum dots in solid state by electrodeposition technology. membrane problem

Method used

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preparation example Construction

[0031] Correspondingly, the embodiment of the present invention also provides a preparation method of composite quantum dots, comprising the following steps:

[0032] S01. Dispersing the halide in a polar solvent to obtain a halide anion, wherein the polar solvent is an organic solvent capable of ionizing the halide to form a halide anion and a halide cation;

[0033] S02. Provide quantum dots with oil-soluble ligands on the surface, mix the quantum dots with the halide anions, and exchange the halide anions with the ligands on the surface of the quantum dots to prepare halide anions modified quantum dots.

[0034] The preparation method of the composite quantum dot provided by the embodiment of the present invention only needs to mix the quantum dot containing the oil-soluble ligand on the surface with the halide anion, so that the halide anion and the oil-soluble ligand undergo ligand exchange, and then the quantum dot particle The halide anions are combined on the surface ...

Embodiment 1

[0056] A preparation method of composite quantum dots, comprising the following steps:

[0057] The preparation of S1.PbS quantum dots is as follows:

[0058] S11. Lead oleate {Pb(OA) 2}Precursor preparation: Take 0.6mmol of lead acetate trihydrate, 2ml of oleic acid (OA), and 10ml of octadecene (ODE) into a three-necked flask, first exhaust at room temperature for 20min, then raise the temperature to 150°C and stir for 30min The temperature was lowered to 120°C.

[0059] S12. Preparation of sulfur (S) precursor: add 4mmol of S to 6ml of trioctylphosphine (TOP), heat to 170°C for 30min, then cool down to 140°C.

[0060] S13. After raising the temperature of the mixed solution in S11 to 150°C, take 2ml of sulfur (S) precursor and quickly inject it into the flask to react for 10 minutes, quickly take out the heating mantle and wait for the temperature of the mixed solution to cool down to room temperature, then add the extractant Centrifugal separation and cleaning with preci...

Embodiment 2

[0067] a PbCl 3 - or PbCl 4 2- The preparation method of the PbS quantum dot solid film of modification, comprises the following steps:

[0068] Get 100mg embodiment 1 to prepare and contain PbCl 3 - or PbCl 4 2- The modified PbS quantum dots were dispersed in 10ml of methylformamide and dissolved for later use.

[0069] A conductive substrate applied with a forward voltage is placed in the above solution for deposition.

[0070] The quantum dots deposited on the conductive substrate were annealed at 120° C. for 30 min.

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Abstract

The invention provides a composite quantum dot. The composite quantum dot is a halide anion modified quantum dot, comprises quantum dot particles, and halide anions combined with the surfaces of the quantum dot particles. The composite quantum dot possesses electronegativity characteristic; the quantum dot solid state membrane can be prepared through electrodeposition. According to the composite quantum dot with the above characteristics, the optical characteristics of the quantum dot are not changed, quantum dot stability and charge conductive performance are improved, so that the quantum dotsolid state membrane can be prepared through electrodeposition.

Description

technical field [0001] The invention belongs to the field of display technology, and in particular relates to a composite quantum dot, a quantum dot solid film and applications thereof. Background technique [0002] In the field of new display technology, due to the unique advantages of quantum dots such as high color gamut and high stability, quantum display is expected to become the mainstream of future display technology, especially quantum dot TV. [0003] For quantum dot display technology, the preparation of quantum dot color film is the key to quantum dot display technology. Therefore, how to prepare high-quality and low-cost quantum dot color film is necessary for the development of this technology. The prior art mainly adopts the way of coating to prepare quantum dot color film, but the cost of this technology is relatively high. In addition, there is also a technology that uses electrochemical deposition technology to prepare quantum dot solid films. For electroch...

Claims

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Application Information

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IPC IPC(8): C09K11/66H01L33/06B82Y40/00B82Y20/00
CPCC09K11/661H01L33/06B82Y40/00B82Y20/00
Inventor 程陆玲杨一行
Owner TCL CORPORATION
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