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A kind of preparation method of led and film

A technology of LED chips and thin films, applied in the field of quantum dot light-emitting devices, can solve the problems of uncontrollable and single color of carbon quantum dots

Active Publication Date: 2021-02-19
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a method for preparing LEDs and thin films, aiming to solve the problem that the existing carbon quantum dots have a single color and cannot be adjusted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047]Step 1: Weigh 5mg of the dried carbon quantum dots, dissolve it in 10ml of chloroform, stir well to make the carbon quantum dots evenly dispersed;

[0048]Step 2: Add methyl orthosilicate to the solution prepared in step 1, and stir while adding. The mass ratio of the silanization reagent to the carbon quantum dots is 0.1. After adding the reagent, continue to stir for 0.5 hours to bring the methyl orthosilicate into contact The residual water in the solution or the water in the air is hydrolyzed to produce silica and wrap on the surface of the carbon quantum dots;

[0049]Step 3: Dissolve PMMA in chloroform with a mass ratio of 0.1. Continuous stirring is required during the dissolution process;

[0050]Step 4: The solution prepared in step 2 is made into a carbon quantum dot layer on glass by spin coating. The spin coating speed is controlled at 500 rpm, and the spin coating time is controlled at 30 seconds. After spin-coating a layer of solution, cure at room temperature for 30 minu...

Embodiment 2

[0053]Step 1: Weigh 30mg of dried carbon quantum dots, dissolve it in 50ml of chloroform, stir well to make the carbon quantum dots evenly dispersed;

[0054]Step 2: Add ethyl orthosilicate to the solution prepared in step 1, and stir while adding. The mass ratio of the silylation reagent to the carbon quantum dots is 10:1. After adding the reagents, continue to stir for 10 hours to make the ethyl orthosilicate The residue in the ester contact solution or the moisture in the air is hydrolyzed to produce silica and wrap on the surface of the carbon quantum dots;

[0055]Step 3: Dissolve PMMA in chloroform with a mass ratio of 1:1. The dissolution process requires continuous stirring and heating to 60 degrees Celsius to help dissolve;

[0056]Step 4: The solution prepared in step 2 is made into a carbon quantum dot layer on glass by spin coating. The spin coating speed is controlled at 3000 rpm, and the spin coating time is controlled at 180 seconds. After spin-coating a layer of quantum dots,...

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Abstract

An LED (1) and a method for preparing a thin film (3). The LED (1) comprises an LED chip (2) and a thin film (3) formed on the LED chip (2). The thin film (3) comprises a plurality of stacked carbon quantum dot layers (4) and PMMA layers (5) provided among the carbon quantum dot layers (4). The LED (1) and the thin film (3) adjust the number of layers of the carbon quantum dot layers (4) according to actual requirements by using the characteristic that the light emitting colors of carbon quantum dots in the carbon quantum dot layers (4) change along with different excitation wavelengths so as to adjust an overall light emitting color of a device, and the carbon quantum dots can be widely applied in display modules as fluorescent powder, and have large application potential.

Description

Technical field[0001]The invention relates to the field of quantum dot light-emitting devices, in particular to a method for preparing LEDs and films.Background technique[0002]Due to its unique electrical, optical, mechanical and other excellent properties, quantum dots have a wide range of applications in the fields of optoelectronic display, biological sensing, and solar cells, and have become a research hotspot. However, because traditional fluorescent quantum dots contain heavy metal elements, such as Cd, Te, etc., these traditional quantum dots not only have high production costs, but also have strong biological toxicity; in addition, the preparation of traditional fluorescent quantum dots requires strict control of the preparation process The water and oxygen in the air, which put forward high requirements for equipment and synthesis process. The defects of traditional quantum dots in these aspects limit its application and development.[0003]In recent years, carbon nanomateria...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L33/50B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01L33/502H01L33/505H01L2933/0041H01L33/50
Inventor 黄盼宁杨一行
Owner TCL CORPORATION