Method for improving fluorescence yield and stability of bi-based perovskite nano material and product

A technology of nanomaterials and fluorescence yield, applied in chemical instruments and methods, luminescent materials, organic chemistry, etc., can solve the problems of QLED devices being far apart, poor fluorescence performance of nanomaterials, large defect density, etc., to achieve improved fluorescence quantum Improved yield and stability, fluorescence quantum yield and stability, and easy operation

Active Publication Date: 2017-08-04
HUAZHONG UNIV OF SCI & TECH
View PDF4 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to factors such as high defect density or poor stability of bulk materials, the fluorescence properties of the obtained nanomaterials are poor.
Currently reported Bi-based perovskite quantum dots (MA 3 Bi 2 Br 9 ) has a quantum yield of 4% to 12%; CsSnX synthesized by Tom C.Jellicoe et al. 3 The highest yield of quantum dots is only 0.14%; Deng Zhengtao's res

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for improving fluorescence yield and stability of bi-based perovskite nano material and product
  • Method for improving fluorescence yield and stability of bi-based perovskite nano material and product
  • Method for improving fluorescence yield and stability of bi-based perovskite nano material and product

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] Embodiment one:

[0025] In this embodiment, the method for improving the fluorescence yield and stability of bismuth-based perovskite nanomaterials, the specific preparation steps are as follows:

[0026] Step 1: Clean the white glass bottle with acetone, isopropanol, and deionized water for 15 minutes, then dry it with a nitrogen gun;

[0027] Step 2: Pour 0.0418g octylamine bromide (OlaBr) into glass bottle A, then add 1mL DMF to obtain solution A, then weigh 0.0315g bismuth chloride (BiCl 3 ) and 0.0448g bismuth bromide (BiBr 3 ) into glass bottle B, adding 2 mL of ethyl acetate to bottle B to dissolve the reactant to obtain solution B, and then mixing the two solutions to obtain precursor solution C;

[0028] Step 3: Add 5mL of n-octane and 0.3mL of oleic acid into glass bottle B as anti-solvent, and heat it to 50°C;

[0029] Step 4: Inject 1mL of the precursor solution into the anti-solvent quickly, stir the reaction for one minute, then immerse the glass bottl...

Example Embodiment

[0031] Embodiment two:

[0032] In this embodiment, the method for improving the fluorescence yield and stability of bismuth-based perovskite nanomaterials, the specific preparation steps are as follows:

[0033] Step 1: Clean the white glass bottle with acetone, isopropanol, and deionized water for 15 minutes, then dry it with a nitrogen gun;

[0034] Step 2: Pour 0.0224g methylamine bromide (MABr) into glass bottle A, then add 1mL DMF to obtain solution A, then weigh 0.021g bismuth chloride (BiCl 3 ) and 0.031g bismuth bromide (BiBr 3 ) was poured into glass bottle B, and 1 mL of ethyl acetate was added to bottle B to dissolve the reactant to obtain solution B, and then the two solutions were mixed to obtain precursor solution C;

[0035] Step 3: Add 2.5mL of n-octane and 0.15mL of oleic acid into glass bottle B as anti-solvent, and heat it to 50°C;

[0036] Step 4: Inject 1mL of the precursor solution into the anti-solvent quickly, stir the reaction for one minute, then ...

Example Embodiment

[0038] Embodiment three

[0039] In this embodiment, the method for improving the fluorescence yield and stability of bismuth-based perovskite nanomaterials, the specific preparation steps are as follows:

[0040] Step 1: Clean the white glass bottle with acetone, isopropanol, and deionized water for 15 minutes, then dry it with a nitrogen gun;

[0041] Step 2: Pour 0.0224g methylamine bromide (MABr) and 0.0418g octylamine bromide (OlaBr) into glass bottle A, then add 2mL DMF to obtain solution A, then weigh 0.0596g bismuth chloride (BiCl 3 ) and 0.0419g bismuth bromide (BiBr 3 ) into glass bottle B, adding 2 mL of ethyl acetate to bottle B to dissolve the reactant to obtain solution B, and then mixing the two solutions to obtain precursor solution C;

[0042] Step 3: Add 5mL of n-octane and 0.3mL of oleic acid into glass bottle B as anti-solvent, and heat it to 50°C;

[0043] Step 4: Inject 1mL of the precursor solution into the anti-solvent quickly, stir the reaction for ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for improving the fluorescence yield and the stability of a bi-based perovskite nano material and a product. The method comprises the following steps: introducing long chain amine and a chloride source into a precursor raw material required by preparation of a quantum dot MA3Bi2Br9, and by regulating and controlling the adding ratios of the long chain amine and the chloride source which are introduced, finally obtaining a product shaped like (MAxOLA1-x)3Bi2ClyBr9-y. According to the method, under the intercalation action of the long chain amine, the shape and the appearance of the product can be changed from the quantum dot into a nano sheet, so that the stronger exciton confinement effect is achieved, and the fluorescence quantum yield can be increased; by the use of the high bond energy of a bismuth-chloride bond, the stability of the quantum dot MA3Bi2Br9 is improved, and surface defects are passivated, therefore, the fluorescence quantum yield of the final product is increased. After the improvement on constituents and the structure of the quantum dot MA3Bi2Br9, compared with the prior art, the method has the advantage of effectively improving the fluorescence yield and the stability of the bi-based perovskite nano material.

Description

technical field [0001] The invention belongs to the field of photoelectric material preparation, in particular to a method and product for improving the fluorescence yield and stability of bismuth-based perovskite nanomaterials. Background technique [0002] As a new generation of light-emitting semiconductor materials, perovskite nanomaterials not only have a simple preparation method (it can be obtained by solution processing at low temperature), but also have excellent optical properties such as high quantum yield, narrow half-peak width, and adjustable emission wavelength. The field of LED lighting and display shows great application value. [0003] In order to solve the stability and toxicity problems of this material, in recent years, the research on perovskite based on new non-toxic elements (such as Sn, Bi, Ge, etc.) has attracted more and more attention. However, due to factors such as high defect density or poor stability of bulk materials, the fluorescence proper...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C09K11/06C07C211/04
CPCC07C211/04C09K11/06C09K2211/10
Inventor 唐江杨颖冷美英牛广达陈正午
Owner HUAZHONG UNIV OF SCI & TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap