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Red perovskite quantum dot with stable luminescence property, and preparation method thereof

A luminescent performance, perovskite technology, applied in luminescent materials, chemical instruments and methods, nano-optics, etc., can solve problems such as the unsatisfactory performance of perovskite quantum dots, and achieve good market prospects, stable luminescent performance, and stability. high effect

Active Publication Date: 2020-05-08
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The performance of perovskite quantum dots is not ideal

Method used

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  • Red perovskite quantum dot with stable luminescence property, and preparation method thereof
  • Red perovskite quantum dot with stable luminescence property, and preparation method thereof
  • Red perovskite quantum dot with stable luminescence property, and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, a preparation method of red light perovskite quantum dots, the steps are as follows:

[0031] a. Take 0.391g of Cs 2 CO 3 , 18mL of octadecene (ODE) and 1mL of oleic acid (OA) were added to the three-necked flask, and vacuum was carried out at 120°C for 1 hour, and then N 2 , until Cs 2 CO 3 Completely react with OA to form Cs-OA, which will be frozen and stored for later use;

[0032] b. According to the ratio of raw materials, take 0.13mmol of PbBr 2 and 0.27 mmol PbI 2 , 24ml of octadecene (ODE), 3mL of oleylamine (OLA), and 3mL of tetra-n-butyl titanate were placed in another three-necked flask for mixing, and the resulting mixture was heated at 120°C. Dry in vacuo for 1 h, then in N 2 atmosphere, wait for PbBr 2 and PbI 2 Completely dissolved to form a transparent bright yellow solution;

[0033]c. Then raise the temperature of the transparent bright yellow solution system prepared in step b to 160°C; then inject 3 mL of the transparen...

Embodiment 2

[0038] This embodiment is basically the same as Embodiment 1, especially in that:

[0039] In this embodiment, a preparation method of red light perovskite quantum dots, the steps are as follows:

[0040] a. Take 0.391g of Cs 2 CO 3 , 18mL of octadecene (ODE) and 1mL of oleic acid (OA) were added to the three-necked flask, and vacuum was carried out at 120°C for 1 hour, and then N 2 , until Cs 2 CO 3 Completely react with OA to form Cs-OA, which will be frozen and stored for later use;

[0041] b. According to the ratio of raw materials, take 0.13mmol of PbBr 2 and 0.27 mmol PbI 2 , 24ml of octadecene (ODE), 3mL of oleylamine (OLA), and 1mL of tetra-n-butyl titanate were placed in another three-necked flask for mixing, and the resulting mixture was heated at 120°C. Dry in vacuo for 1 h, then in N 2 atmosphere, wait for PbBr 2 and PbI 2 Completely dissolved to form a transparent bright yellow solution;

[0042] c. Then raise the temperature of the transparent bright ...

Embodiment 3

[0046] This embodiment is basically the same as the previous embodiment, and the special features are:

[0047] In this embodiment, a preparation method of red light perovskite quantum dots, the steps are as follows:

[0048] a. Take 0.391g of Cs 2 CO 3 , 18mL of octadecene (ODE) and 1mL of oleic acid (OA) were added to the three-necked flask, and vacuum was carried out at 120°C for 1 hour, and then N 2 , until Cs 2 CO 3 Completely react with OA to form Cs-OA, which will be frozen and stored for later use;

[0049] b. According to the ratio of raw materials, take 0.13mmol of PbBr 2 and 0.27 mmol PbI 2 , 24ml of octadecene (ODE), 3mL of oleylamine (OLA), and 3mL of tetra-n-butyl titanate were placed in another three-necked flask for mixing, and the resulting mixture was heated at 120°C. Dry in vacuo for 1 h, then in N 2 atmosphere, wait for PbBr 2 and PbI 2 Completely dissolved to form a transparent bright yellow solution;

[0050] c. Then raise the temperature of th...

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Abstract

The invention relates to a red perovskite quantum dot with stable luminescence property, and a preparation method thereof. The chemical formula of the material composition of the red perovskite quantum dot is CsPbBrxI3-X, wherein x is greater than 0 and less than 3. The preparation method of the red perovskite quantum dot uses a short-chain metal organic salt for replacing oleic acid added in theprocess of preparing quantum dots by a traditional thermal injection method, the addition of the organic short chain passivates the surface of the perovskite quantum dot and remarkably improves the stability of the red perovskite quantum dot, and the luminous intensity and the stability are greatly improved compared with those of a red quantum dot prepared from traditional oleic acid. The preparedquantum dot is dispersed in n-hexane, has good dispersibility, and is easy for subsequent QLED packaging. The red perovskite quantum dot is stable in luminescent property and high in luminescent intensity, and the stability of the red perovskite quantum dot to oxygen and water vapor is higher than that of the red perovskite quantum dot prepared by the traditional thermal injection method.

Description

technical field [0001] The invention relates to a quantum dot light-emitting material and a preparation method thereof, in particular to a red-light perovskite quantum dot and a preparation method thereof, which are applied in the technical field of quantum dot light-emitting device materials. Background technique [0002] As a new type of luminescent material, quantum dots have a long service life, high luminous intensity, simple preparation method and wide color gamut coverage compared with traditional luminescent materials. At present, the quantum dot white light LED materials that have been applied mainly include CdSe, ZnS and so on. The preparation materials of these quantum dots are expensive and highly polluting, which limits the further development of quantum dots. [0003] In recent years, domestic and foreign scholars have made remarkable progress in the preparation, stability improvement, and packaging of all-inorganic perovskite quantum dots. Since the first re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/02C09K11/66H01L33/50B82Y20/00B82Y30/00
CPCC09K11/665C09K11/025H01L33/502B82Y20/00B82Y30/00Y02B20/00
Inventor 雷芳李乃鑫施鹰谢建军章蕾范灵聪
Owner SHANGHAI UNIV
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