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Perovskite quantum dot material and preparation method and application thereof

A technology of quantum dot materials and perovskite, which is applied in nanotechnology, luminescent materials, chemical instruments and methods for materials and surface science, can solve problems such as fluorescence quenching, achieve high quenching pressure, and improve detection effect, the effect of short fluorescence lifetime

Active Publication Date: 2021-11-05
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Aiming at the above-mentioned problems existing in the prior art, the present invention provides a perovskite quantum dot material and its preparation method and application. The perovskite quantum dot material can effectively solve the high pressure problem existing in the existing perovskite quantum dot material The environment is prone to the problem of fluorescence quenching

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  • Perovskite quantum dot material and preparation method and application thereof
  • Perovskite quantum dot material and preparation method and application thereof
  • Perovskite quantum dot material and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A kind of perovskite quantum dot material, its preparation method comprises the following steps:

[0028] (1) Mix 0.814g cesium carbonate, 40ml octadecene and 2.5ml oleic acid under vacuum conditions and heat up to 100°C for drying, then heat up to 140°C until cesium carbonate and oleic acid react completely to obtain cesium oleate solution;

[0029] (2) heating 0.069g of lead bromide and 5ml of octadecene to 100°C for drying under vacuum conditions to obtain a lead precursor solution;

[0030] (3) Warm up 0.018g of cerium bromide and 0.5ml of oleic acid to 50°C under vacuum until the cerium bromide is completely dissolved to obtain a cerium precursor solution;

[0031] (4) Under ambient conditions, inject 0.5ml of oleylamine and 0.5ml of the cerium precursor solution in step (3) into the lead precursor solution in step (2) respectively, and raise the temperature of the mixed solution to 170°C under vacuum , until lead bromide is completely dissolved;

[0032] (5) Un...

Embodiment 2

[0034] A kind of perovskite quantum dot material, its preparation method comprises the following steps:

[0035] (1) Mix 0.814g cesium carbonate, 40ml octadecene and 2.5ml oleic acid under vacuum conditions and heat up to 120°C for drying, then heat up to 150°C until cesium carbonate and oleic acid react completely to obtain cesium oleate solution;

[0036] (2) heating 0.069g of lead bromide and 5ml of octadecene to 120° C. for drying under vacuum conditions to obtain a lead precursor solution;

[0037] (3) Warm up 0.0214g cerium bromide and 0.5ml oleic acid to 60°C under vacuum until the cerium bromide is completely dissolved to obtain a cerium precursor solution;

[0038] (4) Under ambient conditions, inject 0.5ml of oleylamine and 0.5ml of the cerium precursor solution in step (3) into the lead precursor solution in step (2) respectively, and raise the temperature of the mixed solution to 180°C until bromine Lead chloride is completely dissolved;

[0039] (5) Under ambie...

Embodiment 3

[0041] A kind of perovskite quantum dot material, its preparation method comprises the following steps:

[0042] (1) Mix 0.814g cesium carbonate, 40ml octadecene and 2.5ml oleic acid under vacuum conditions and heat up to 120°C for drying, then heat up to 160°C until cesium carbonate and oleic acid react completely to obtain cesium oleate solution;

[0043] (2) heating 0.069g of lead bromide and 5ml of octadecene to 120° C. for drying under vacuum conditions to obtain a lead precursor solution;

[0044] (3) Warm up 0.025g of cerium bromide and 0.5ml of oleic acid to 70°C under vacuum until the cerium bromide is completely dissolved to obtain a cerium precursor solution;

[0045] (4) Under ambient conditions, inject 0.5ml of oleylamine and 0.5ml of the cerium precursor solution in step (3) into the lead precursor solution in step (2) respectively, and raise the temperature of the mixed solution to 190°C until bromine Lead chloride is completely dissolved;

[0046] (5) Under ...

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Abstract

The invention provides a perovskite quantum dot material and a preparation method and application thereof, wherein the preparation method comprises the following steps: mixing cesium carbonate, octadecene and oleic acid under a vacuum condition, and heating until the cesium carbonate and the oleic acid are completely reacted to obtain a cesium oleate solution; heating and dissolving lead bromide and octadecene under a vacuum condition to obtain a lead precursor solution; heating cerium bromide and oleic acid under a vacuum condition until the cerium bromide is completely dissolved to obtain a cerium precursor solution; and respectively injecting oleylamine and a cerium precursor solution into the lead precursor solution under environmental conditions, heating the mixed solution to 170-190 DEG C until lead bromide is completely dissolved under vacuum conditions, then injecting a cesium oleate solution into the mixed solution under environmental conditions, carrying out stirring reaction for 40-80 seconds, and carrying out ice-water bath cooling and centrifugation to prepare the cerium ion doped perovskite quantum dot material. The rare earth ion doped perovskite quantum dot material can effectively solve the problem that fluorescence quenching easily occurs in a high-pressure environment in an existing perovskite quantum dot material.

Description

technical field [0001] The invention belongs to the technical field of quantum dot materials, and in particular relates to a perovskite quantum dot material and its preparation method and application. Background technique [0002] Perovskite quantum dots have been widely used in optoelectronic fields such as photovoltaics, photodetection, lighting displays, and scintillators due to their excellent optoelectronic properties such as tunable wavelength, high light absorption coefficient, and ultra-long carrier diffusion length. At present, due to the advantages of high luminous efficiency, short fluorescence lifetime and strong stability, perovskite quantum dots have become one of the excellent scintillator candidate materials. As the core device of radiation detection, they have shown great promise in important fields such as medical diagnosis and homeland security Bring out huge application value. There is an increasing demand for radiation detection under extreme conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66G01T1/20B82Y20/00B82Y30/00
CPCC09K11/772G01T1/2012B82Y20/00B82Y30/00Y02E10/549
Inventor 刘鲍田梦周鹏宇张宇迟凯粼翟阅臣韩丹丹
Owner NORTHEAST DIANLI UNIVERSITY
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