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Transition metal ion doped perovskite quantum dot material and preparation method thereof

A quantum dot material, transition metal technology, applied in luminescent materials, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the problems of unstable crystal structure of all-inorganic perovskite quantum dot materials, etc. To achieve the effect of simple and efficient adjustment of reaction parameters, excellent luminescence performance, and improved water stability

Active Publication Date: 2022-06-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to provide a highly stable perovskite quantum dot material, the present invention explores a method for improving its stability, so as to solve the problem of unstable crystal structure of the all-inorganic perovskite quantum dot material

Method used

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  • Transition metal ion doped perovskite quantum dot material and preparation method thereof
  • Transition metal ion doped perovskite quantum dot material and preparation method thereof
  • Transition metal ion doped perovskite quantum dot material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0060] This embodiment provides a perovskite quantum dot material, and the preparation method includes the following steps:

[0061] (1) Preparation of cesium oleate precursor solution; 0.2g of cesium carbonate, 0.7ml of oleic acid and 10ml of 1-octadecene were weighed and put into a 25ml three-necked flask, and after vacuum drying at 120 ° C for 1h, under an inert gas environment Heating to 150℃, after the cesium carbonate is completely dissolved, adjust the temperature back to 120℃ for subsequent use;

[0062] (2) prepare the mixed solution of lead iodide and nickel iodide: 92.2mg lead iodide and 62.5mg nickel iodide are weighed and loaded into a 25ml three-necked flask, and 5ml 1-octadecene and 1ml tri-n-octyl are added Phosphine, after vacuum drying at 120 °C for 1 h, inject 1 ml of dry oleylamine and oleic acid respectively, and heat the solution to 170 °C under an inert atmosphere when the solution is clear and transparent;

[0063] (3) take 0.4ml of the cesium oleate p...

Embodiment 2

[0067] This embodiment provides a perovskite quantum dot material, and the preparation method includes the following steps:

[0068] (1) Preparation of cesium oleate precursor solution; 0.2g of cesium carbonate, 0.7ml of oleic acid and 10ml of 1-octadecene were weighed and put into a 25ml three-necked flask, and after vacuum drying at 120 ° C for 1h, under an inert gas environment Heating to 150℃, after the cesium carbonate is completely dissolved, adjust the temperature back to 120℃ for subsequent use;

[0069] (2) prepare the mixed solution of lead iodide and nickel iodide: 92.2mg lead iodide and 187.5mg nickel iodide are weighed and loaded into a 25ml three-necked flask, and 5ml 1-octadecene and 1ml tri-n-octyl are added Phosphine, after vacuum drying at 120 °C for 1 h, inject 1 ml of dry oleylamine and oleic acid respectively, and heat the solution to 170 °C under an inert atmosphere when the solution is clear and transparent;

[0070] (3) take 0.4ml of the cesium oleate ...

Embodiment 3

[0074] This embodiment provides a perovskite quantum dot material, and the preparation method includes the following steps:

[0075] (1) Preparation of cesium oleate precursor solution; 0.2g of cesium carbonate, 0.7ml of oleic acid and 10ml of 1-octadecene were weighed and put into a 25ml three-necked flask, and after vacuum drying at 120 ° C for 1h, under an inert gas environment Heating to 150℃, after the cesium carbonate is completely dissolved, adjust the temperature back to 120℃ for subsequent use;

[0076] (2) prepare the mixed solution of lead iodide and nickel iodide: 92.2mg lead iodide and 187.5mg nickel iodide are weighed and loaded into a 25ml three-necked flask, and 5ml 1-octadecene and 1ml tri-n-octyl are added Phosphine, after vacuum drying at 120 °C for 1 h, inject 1 ml of dry oleylamine and oleic acid respectively, and heat the solution to 185 °C under an inert atmosphere when the solution is clear and transparent;

[0077] (3) take 0.4ml of the cesium oleate ...

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Abstract

The invention relates to the technical field of photoelectric materials, in particular to a transition metal ion doped perovskite quantum dot material and a preparation method thereof. The transition metal ion doped perovskite quantum dot material has excellent hygrothermal stability and water stability, still has bright luminescence and retains up to 95% of black phase after being placed in an environment of 85 DEG C and 85% of relative humidity for 100 h, and only retains 51.7% of black phase in 40th min when a sample is not doped, so that the stability after doping is improved by more than 150 times; in addition, after the doped dispensing quantum dot film is soaked in deionized water for 100 hours, the doped dispensing quantum dot film still has excellent luminescence performance; after the doped quantum dot solution and water are mixed and stirred for 200 hours, the bright red light emitting property is still kept, and the high light emitting intensity is still shown after 284 hours.

Description

technical field [0001] The invention relates to the technical field of optoelectronic materials, in particular to a transition metal ion-doped perovskite quantum dot material and a preparation method thereof. Background technique [0002] The large-scale use of fossil energy provides great convenience for human life, but it also brings many challenges such as environmental pollution and climate change. On the other hand, the problem of energy shortage caused by the unsustainable fossil energy also threatens the cornerstone of the industrial civilization established by mankind for hundreds of years. Faced with the deteriorating environment and the shortage of fossil energy, developing a clean and sustainable new energy supply system is the only way for mankind to lead into the future. As a widely distributed energy form around the world, solar energy has the advantages of being clean, pollution-free and renewable. It is one of the new energy forms that human beings can utili...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66B82Y30/00B82Y20/00
CPCC09K11/665B82Y20/00B82Y30/00Y02E10/549
Inventor 黄建媚邹胜文
Owner BEIHANG UNIV
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