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Oxide-coated quantum dot LED preparation method

A technology of oxides and quantum dots, applied in electrical components, circuits, semiconductor devices, etc., can solve problems such as unstable work, poor thermal stability, and low luminous efficiency, and achieve improved reliability and service life, low cost, and easy preparation The effect of simple process

Active Publication Date: 2018-11-13
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of oxide-coated quantum dot LED, which aims to solve the problems of poor thermal stability, low light / electroluminescence efficiency, unstable operation and short service life of existing LEDs

Method used

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  • Oxide-coated quantum dot LED preparation method

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preparation example Construction

[0015] see figure 1 , figure 1 A schematic flow chart of a method for preparing an oxide-coated quantum dot LED provided by an embodiment of the present invention. A method for preparing an oxide-coated quantum dot LED according to an embodiment of the present invention includes the following steps:

[0016] Step S01: Mixing the metal salt and fatty amine at a first preset temperature to obtain a metal mixture.

[0017] In the embodiment of the present invention, at the first preset temperature, the metal salt and the fatty amine are mixed, the metal salt is dissolved in the fatty amine, and finally a metal mixed liquid is obtained. Among them, the metal salt can be at least one of acetate, halide salt, carbonate, stearate, but not limited to the aforementioned materials; the fatty amine is preferably an unsaturated fatty primary amine, in order to stabilize the particles in the solution It is better to choose high-boiling point polar substance oleylamine and metal salt for...

Embodiment 1

[0043] This embodiment takes the red InP / ZnS core-shell quantum dot phosphor powder coated with indium oxide and the green InP / ZnSeS core-shell quantum dot phosphor powder coated with indium oxide as the fluorescent layer, and the preparation of a white LED with a blue LED chip as the light source as an example. , the method of the present invention is described, comprising the following steps:

[0044] 1. Preparation of red InP / ZnS core-shell quantum dots coated with indium oxide

[0045] 1) Preparation of indium precursor mixture

[0046] 5.81 mmol of indium acetate (Indium(III) acetate) was dissolved in 4 ml of oleylamine (Oleylamine) at 120° C. to obtain a mixed liquid of indium precursor.

[0047] 2) Preparation of indium oxide-coated red InP / ZnS core-shell quantum dot solution

[0048] At 210°C, the above-prepared indium precursor mixture was added to the red InP / ZnS quantum dot reaction system that had been reacted in a three-necked flask, and reacted at 180°C for 1 h...

Embodiment 2

[0061] This embodiment takes zinc oxide-coated red InP / ZnS core-shell quantum dot phosphor powder and zinc oxide-coated green core-shell quantum dot phosphor powder as the fluorescent layer, and the preparation of a white LED with a blue LED chip as the light source as an example. The method is described, including the following steps:

[0062] 1. Preparation of red InP / ZnS core-shell quantum dots coated with zinc oxide

[0063] 1) Preparation of zinc precursor mixture

[0064] 2.3 mmol of zinc acetate (Indium(III) acetate) was dissolved in 4 ml of oleylamine (Oleylamine) at 120° C. to obtain a zinc precursor mixture.

[0065] 2) Preparation of zinc oxide-coated red InP / ZnS core-shell quantum dot solution

[0066] At 210°C, the above-prepared zinc precursor mixture was added to the red InP / ZnS quantum dot reaction system that had been reacted in a three-necked flask, and reacted at 180°C for 1 h. Among them, the luminescence peak of the red InP / ZnS quantum dot is 630nm, the...

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Abstract

The invention belongs to the illumination and display technical field, and provides an oxide-coated quantum dot LED preparation method; the method coats a metal oxide on quantum dots so as to obtain the metal oxide-coated quantum dot LED, thus effectively separating quantum dots of the LED from the outer side, preventing quantum dot oxidation, improving quantum dot thermal stability and light / electroluminescent efficiency, and improving the LED reliability and service life. The preparation method is simple in process, low in cost, and can easily realize large scale production.

Description

technical field [0001] The invention belongs to the technical field of illumination and display, and in particular relates to a preparation method of an oxide-coated quantum dot LED. Background technique [0002] In recent years, light emitting diode (Light Emitting Diode, LED), as a new type of solid-state lighting device, has the advantages of low driving voltage, high luminous efficiency, low radiation, and long life. Among them, white light-emitting diodes are widely used in lighting and display fields due to their low power consumption, fast response time, and environmental protection. They are currently the mainstream commercial green lighting sources in the market. [0003] At present, the most commonly used method to realize white LED is to combine quantum dot phosphor powder with blue LED chips to emit mixed light. However, in the technology of realizing white light LED, quantum dots often show poor thermal stability under continuous light excitation, and the photo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L33/00H01L33/06
CPCH01L33/005H01L33/06
Inventor 聂志文刘政杨一行
Owner TCL CORPORATION
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