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Preparation method of two-dimensional hybrid halide perovskite nanosheet

A halide perovskite and nanosheet technology, applied in the preparation of organic compounds, the preparation of amino compounds, organic chemistry methods, etc., can solve the problems of uncontrollable size and morphology, and achieve a very high confinement effect and purity. High and uniform effect

Pending Publication Date: 2022-01-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the size and shape of the materials prepared by this method are uncontrollable.

Method used

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  • Preparation method of two-dimensional hybrid halide perovskite nanosheet
  • Preparation method of two-dimensional hybrid halide perovskite nanosheet
  • Preparation method of two-dimensional hybrid halide perovskite nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1 (NAPH) 2 PBCL 4 Preparation of body materials

[0039] Chloride and 2-naphthyl-ammonium chloride were dissolved in dimethylformamide at 1: 2 molar ratio, so that the solution was slowly evaporated, and the colorless crystals were grown. Figure 3-5 Scale Bar is 4 μm and 3 μm and 500 nm scanning electron microscope photos. Can be clearly seen, (NAPH) 2 PBCL 4 The overall formation is very thick, which is difficult to reflect the size of the material.

Embodiment 2

[0040] Example 2 (NAPH) 2 PBCL 4 Micron sheet preparation

[0041] 0.2mmol NAPH, 0.1mmol PBCL 2 DMF (500 μL), 0.5 ml of HBR (a mass fraction of 40%, density of 1.38 g / ml, and the same) was placed in a 30 ml tapered bottle. The mixture was stirred at room temperature until the solution was clarified to form a precursor solution of a calcium titanium ore. Then, 200 μl of the precursor solution of 200 μl of titanium titanium ore was quickly dropped into 10 ml of n-hexane, and stirred vigorously. Finally, 2 mL of acetone is rapidly injected and stirred for 12 h, it is obtained from the anti-solvent method to obtain (NAPH) 2 PBCL 4 Micron sheet, Figure 6-7 Scale Bar is 40 μm and 4 μm scanning electron microscope photo. As can be seen from the figure, the thickness of the sheet is reduced relative to the body material, but there is no rule.

[0042] The above Examples 1, 2 is the control example, and the conventional antimodational method or the improved anti-solubility method is prep...

Embodiment 3

[0043] Example 3 (NAPH) 2 PBCL 4 Preparation of nano sheets

[0044] 0.2mmol NAPH, 0.1mmol PBCL 2 , DMF (500 μL), 0.5 ml of HBR, 2.65 μL of n-octamine was placed in a 30 ml tapered bottle. The mixture was stirred at room temperature until the solution was clarified to form a precursor solution of a calcium titanium ore. Then, 200 μl of the precursor solution of 200 μl of titanium titanium ore was quickly dropped into 10 ml of n-hexane, and stirred vigorously. Finally, by rapid injection of 2 ml of acetone and stirred for 2 h, the anti-solvent method is used. Figure 8 Scanning photos of a scales (Scale Bar) to 1 μm Transmission electron microscope. Using this method, it has been scanned under the transmission electron microscope, indicating that the thickness of the thin film is very thin, and is thinned (NAPH) 2 PBCL 4 Nanosheets.

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Abstract

The invention relates to a preparation method of a two-dimensional hybrid halide perovskite nanosheet, and belongs to the technical field of semiconductor nanomaterial preparation. The preparation method comprises the following steps: stirring and mixing NAPH, PbCl2, DMF, HBr and n-octylamine at room temperature until the solution is clear to form a perovskite precursor solution; and rapidly dropwise adding the perovskite precursor solution into normal hexane under violent stirring, rapidly injecting acetone into the system, and stirring for 2-12 hours to obtain the two-dimensional hybrid halide perovskite nanosheet. According to the invention, the regulation and control of the synthetic morphology are realized by changing the reaction time and the dosage of the n-octylamine ligand, and the synthetic material is uniform in morphology and relatively high in purity, so that synthesis of the nanosheet is realized for the first time, the vacancy of the material synthesis technology is filled, and conditions are provided for the research of the nanosheet in the field of luminescent materials.

Description

Technical field [0001] The present invention belongs to the technical field of semiconductor nanomaterial preparation, and in particular, the present invention relates to a method of preparing high purity nanoflakes and morphological regulation. Background technique [0002] Organic-Inorganic Hybrid Metal Halidelate Titanium Mine has broad application prospects in the fields of laser, light-emitting diodes, ferroelectric devices, solar cells and photodetectors, due to their excellent physical properties. Interestingly, the structural dimension of the inorganic skeleton based on these hybrid calcium ore can be easily adjusted from one-dimensional to three-dimensional, and their optical and electrical properties are changed by selecting suitable organic ammonium ions. Among them, the two-dimensional (2D) organic-inorganic hybrid material has the characteristics of structural diversification, good humid stability. In addition, since the inorganic adjacent layer is separated by organ...

Claims

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Application Information

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IPC IPC(8): C07C209/00C07C211/30C09K11/06C09K11/66B82Y40/00
CPCC07C209/00C09K11/06C09K11/664B82Y40/00C07B2200/13C01P2002/34C07C211/30Y02E10/549
Inventor 肖冠军赵电龙马志伟丛铭邹勃
Owner JILIN UNIV
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