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Preparation method of quantum dot light-emitting device and product thereof

A technology of quantum dot light-emitting and device, applied in the field of preparation of quantum dot light-emitting device, can solve the problems of unstable light-emitting of quantum dot light-emitting device, easy entry of water vapor or air at the connection, loose coating, etc., so as to avoid adverse effects, The effect of saving packaging material and reducing damage

Inactive Publication Date: 2019-08-13
SUZHOU XINGSHUO NANOTECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The preparation of existing quantum dot light-emitting devices often uses LED brackets, generally copper, iron, aluminum or ceramics encapsulated by PPA or EMC as the bracket material.
Because the quantum dot material is easily damaged by water and oxygen, the luminescence of the quantum dot light-emitting device is unstable, the life is short, and the performance is poor.

Method used

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  • Preparation method of quantum dot light-emitting device and product thereof
  • Preparation method of quantum dot light-emitting device and product thereof
  • Preparation method of quantum dot light-emitting device and product thereof

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preparation example Construction

[0021] see figure 1 , the application provides a method for preparing a quantum dot light-emitting device, comprising the following steps:

[0022] S1. Add the wavelength conversion material into the dispersion medium, and mix uniformly to obtain a dispersion liquid of the wavelength conversion material.

[0023] The wavelength conversion material is a quantum dot material, and different sizes or types of quantum dots are selected according to the light output color required by the light emitting device. The quantum dot material can be excited by the light emitted by the light source and converted into light of other different wavelengths, thereby realizing a light-emitting device with various colors. In a specific embodiment, the quantum dot material is red quantum dots and / or green quantum dots.

[0024] In order to improve the tolerance of the quantum dot material itself to the external environment, such as light, heat, water, oxygen, etc., the surface of the quantum dot ...

Embodiment 1

[0036] A method for preparing a quantum dot light-emitting device, comprising:

[0037] S11. Add the red CdSe / ZnS quantum dots to the epoxy resin, and mix uniformly to obtain a CdSe quantum dot dispersion with a concentration of 2 wt%. Wherein, the surface of the CdSe / ZnS quantum dot is coated with alumina.

[0038] S12, putting the BT resin substrate fixed with the blue LED chip into the cavity of the injection mold;

[0039] S13. Inject the CdSe / ZnS quantum dot dispersion liquid from the runner of the above-mentioned mold until the mold cavity is filled;

[0040] S14. Heat and solidify the CdSe / ZnS quantum dot dispersion liquid in the injection mold to form a luminescent film layer, and obtain a device after opening the mold.

Embodiment 2

[0042] A method for preparing a quantum dot light-emitting device, comprising:

[0043] S21. Add green CdSeS / ZnS quantum dots to the silicone resin, and mix uniformly to obtain a CdSeS quantum dot dispersion with a concentration of 2.5 wt%. Wherein, the surface of the CdSeS / ZnS quantum dot is coated with alumina.

[0044] S22, putting the BT resin substrate fixed with the blue LED chip into the cavity of the injection mold;

[0045] S23. Inject the CdSeS / ZnS quantum dot dispersion liquid from the sprue of the mold until it fills the mold cavity;

[0046] S24. Heat and solidify the CdSeS / ZnS quantum dot dispersion liquid in the injection mold to form a luminescent film layer, and obtain a device after opening the mold.

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Abstract

The invention discloses a preparation method of a quantum dot light-emitting device and a product thereof. The preparation method comprises the following steps: adding a wavelength conversion materialinto a dispersion medium, and performing uniform mixing to obtain dispersion liquid of the wavelength conversion material; putting a substrate on which a light source is fixed into a cavity of an injection mold; injecting the dispersion liquid of the wavelength conversion material from a pouring gate of the mold until the mold cavity is filled with the dispersion liquid; and curing the dispersionliquid of the wavelength conversion material in the injection mold to form a light-emitting film layer, and opening the mold to obtain the device. According to the invention, the quantum dot light-emitting device prepared by the method improves the light-emitting stability.

Description

technical field [0001] The application belongs to the field of semiconductor lighting, and in particular relates to a preparation method of a quantum dot light-emitting device and a product thereof. Background technique [0002] Quantum dot materials have been widely used in the field of LED lighting or display due to their excellent properties such as narrow half-peak width, high luminous purity, and adjustable emission wavelength with size. [0003] The preparation of existing quantum dot light-emitting devices often uses LED brackets, generally copper, iron, aluminum or ceramics encapsulated by PPA or EMC as the bracket material. . Because the quantum dot material is easily damaged by water and oxygen, the luminescence of the quantum dot light-emitting device is unstable, the life is short, and the performance is poor. Therefore, it is necessary to find a new preparation method of quantum dot light-emitting devices to improve the stability of the devices. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L33/50H01L51/52H01L51/56H01L21/56
CPCH01L33/005H01L33/502H01L21/565H10K50/8426H10K71/00
Inventor 李帅马卜王允军
Owner SUZHOU XINGSHUO NANOTECH CO LTD
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