FAX-modified metal halogen perovskite quantum dot and preparation method and application thereof

A perovskite, quantum dot technology, applied in chemical instruments and methods, semiconductor/solid-state device manufacturing, nanotechnology for materials and surface science, etc., can solve problems such as failure to achieve electroluminescence, and achieve suppression of by-products generation, large exciton binding energy, and particle size controllable effects

Active Publication Date: 2018-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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-si

Method used

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  • FAX-modified metal halogen perovskite quantum dot and preparation method and application thereof
  • FAX-modified metal halogen perovskite quantum dot and preparation method and application thereof
  • FAX-modified metal halogen perovskite quantum dot and preparation method and application thereof

Examples

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Example Embodiment

[0040] Example 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 inert gas such as argon or nitrogen, heat and stir at 100-120℃ until completely dissolved to obtain a cesium oleate solution;

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

[0043] (3) Add 0.2g PbBr 2 Dissolve 0.094g FABr and 15mL octadecene, 3mL oleylamine and 1.23mL oleic acid in a mixed solution, put the mixed solution in a three-necked flask, heat and stir at 120℃ for 1 hour, and vent the reaction with argon or nitrogen. The oxygen and water in the system until all the reactants are dissolved; the temperature is raised to 170℃ and kept for 10 minutes, 0.55mL (140℃) of the mixed solution of rubidium and cesium oleate with a molar ratio of ...

Example Embodiment

[0045] Example 2

[0046] The 0.2g PbBr in Example 1 2 Replace with 0.117g PbBr 2 And 0.087g PbCl 2 , The other steps are 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] Rb obtained in this example 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. by Figure 4~6 It can be seen that the synthesized quantum dot material has a good cubic structure, a narrow particle size distribution, and an average particle size of 4.86 nm, showing a strong quantum confinement effect.

Example Embodiment

[0048] Example 3

[0049] The 0.094g FABr in Example 1 was replaced with 0.068g FABr, and the other steps were the same as in Example 1.

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Abstract

The invention belongs to the technical field of electroluminescent materials, and discloses a FAX-modified metal halogen perovskite quantum dot and a preparation method and application thereof. The preparation method comprises the following steps of dissolving a metal halide BXy and formamidine hydrohalates FAX into a long-chain ligand, so as to obtain a precursor solution; injecting a rubidium source and/or a cesium source to react, adding a precipitating agent to precipitate the product, separating, and dispersing into an organic solvent, so as to obtain the FAX-modified metal halogen perovskite quantum dot solution. The prepared FAX-modified metal halogen perovskite quantum dot has the advantages that the particle size is small, the particle size is controllable, the size distribution is narrow, the yield rate of solid-state film fluorescent quantum dot is high, and the like; the great application prospect is realized in the high-efficiency blue light and white light electroluminescence fields.

Description

Technical field [0001] The invention belongs to the technical field of electroluminescent materials, and specifically 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 and X is an anion, belonging to the orthorhombic, tetragonal or cubic crystal system. Metal halide perovskites have excellent photophysical properties, easy chemical modification and solution processability, and are currently one of the best candidates for high-performance optoelectronic devices. At present, perovskite materials have made great breakthroughs in green light, red light and near-infrared light, but still face great challenges in realizing high-efficiency blue electroluminescent materials. [0003] Perovskite quantum dot materials avoid the problems of weak exciton binding energy, poor film formation and poor color purity of quasi-...

Claims

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Application Information

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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
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