Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Fax-modified metal halide perovskite quantum dots and its preparation method and application

A technology of perovskite and quantum dots, applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, nanotechnology for materials and surface science, etc., can solve problems such as not realizing electroluminescence, and achieve suppression of by-products The effect of generation, narrow particle size distribution and small particle size

Active Publication Date: 2020-12-22
SOUTH CHINA UNIV OF TECH
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Previously reported [Amgar, D.; binyamin, T.; Uvarov, V.; Etgar, L. Near Ultra-Violet to Mid-Visible Band Gap Tuning of Mixed Cation Rb x Cs 1-x wxya 3 (X=Cl or Br) Perovskite Nanoparticles.Nanoscale 2018,10,6060-6068.] Through the regulation of A-site cations, photoluminescence from blue light to near-ultraviolet light was realized, but electroluminescence was not realized, and its The resulting quantum dots are large in size (greater than or close to their Bohr radius) and have a wide size distribution

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
  • Fax-modified metal halide perovskite quantum dots and its preparation method and application
  • Fax-modified metal halide perovskite quantum dots and its preparation method and application
  • Fax-modified metal halide perovskite quantum dots and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] (1) Add 0.4g Cs 2 CO 3 Dissolve in a mixed solution of 15mL octadecene and 1.23mL oleic acid, under the protection of an inert gas such as argon or nitrogen, heat and stir at 100-120°C until completely dissolved to obtain a cesium oleate solution;

[0042] (2) Add 0.283g Rb 2 CO 3 Dissolve in a mixed solution of 15mL octadecene and 1.3mL oleic acid, under the protection of an inert gas such as argon or nitrogen, heat and stir at 100-180°C until completely dissolved to obtain rubidium oleate solution;

[0043] (3) 0.2g PbBr 2 Dissolve 0.094g FABr in a mixed solution of 15mL octadecene, 3mL oleylamine and 1.23mL oleic acid, place the mixture in a three-necked flask, heat and stir at 120°C for 1 hour, and exhaust the reaction with argon or nitrogen gas Oxygen and water in the system until all the reactants are dissolved; raise the temperature to 170°C and keep it for 10 minutes, take 0.55mL (140°C) of the mixed solution of rubidium and cesium oleate with a molar ratio ...

Embodiment 2

[0046] With 0.2g PbBr in embodiment 1 2 Replaced with 0.117g PbBr 2 and 0.087g PbCl 2 , other steps are all the same as in Example 1. get Rb 0.044 Cs 0.778 FA 0.78 PbCl 1.03 Br 2.44 Deep blue perovskite quantum dots.

[0047] The obtained Rb of this embodiment 0.044 Cs 0.778 FA 0.78 PbCl 1.03 Br 2.44 The XRD pattern, high-resolution transmission electron microscope pattern and particle size distribution pattern of deep blue perovskite quantum dots are as follows Figure 4~6 shown. Depend on Figure 4~6 It can be seen that the synthesized quantum dot material has a good cubic structure, narrow particle size distribution, and an average particle size of 4.86nm, showing a strong quantum confinement effect.

Embodiment 3

[0049] 0.094g FABr in embodiment 1 is replaced with 0.068g FABr, and other steps are all identical with embodiment 1.

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

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of electroluminescent materials, and discloses a FAX-modified metal halide perovskite quantum dot, a preparation method and an application thereof. Metal Halide BX y Dissolve formamidine hydrohalide salt FAX in the long-chain ligand to obtain a precursor solution, then inject rubidium source and / or cesium source for reaction, add a precipitant to precipitate and separate the product, and then disperse it in an organic solvent to obtain FAX-modified Metal halide perovskite quantum dot solutions. The perovskite quantum dots prepared by the invention have the advantages of small particle size, controllable particle size, narrow size distribution, high fluorescence quantum yield of solid-state thin film, etc., and have great application prospects in high-efficiency blue light and white light electroluminescence.

Description

technical field [0001] The invention belongs to the technical field of electroluminescent materials, and in particular relates to a FAX-modified metal halide perovskite quantum dot and a preparation method and application thereof. Background technique [0002] The general structural formula of perovskite is ABX 3 , where A and B are cations, X is an anion, and belong to the orthorhombic, tetragonal or cubic crystal system. Metal halide perovskites have excellent photophysical properties, chemical facile modification, and solution processability, and are currently one of the best candidates for realizing high-performance optoelectronic devices. At present, perovskite materials have made great breakthroughs in green light, red light and near-infrared light, but they still face great challenges in realizing high-efficiency blue light-emitting materials. [0003] Perovskite quantum dot materials avoid the problems of weak exciton binding energy of 3D perovskite materials, poor...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/06C09K11/66B82Y20/00B82Y30/00B82Y40/00H01L51/50
CPCC09K11/06C09K11/665B82Y20/00B82Y30/00B82Y40/00H10K50/115
Inventor 苏仕健孟凡源陈东成刘鑫妍
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com