Preparation method of 1, 2-dimethyl imidazole cadmium chloride perovskite material and application

A technology of dimethylimidazole and crystal materials, applied in organic chemistry methods, chemical instruments and methods, and 2/12 group organic compounds without C-metal bonds, etc., can solve the problem of preparation methods that have not been reported and systematic research on fluorescence properties Less problems, to achieve the effect of simple method and mild conditions

Inactive Publication Date: 2017-05-10
JIANGNAN UNIV
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Problems solved by technology

[0003] However, when the organic amine at the A position is replaced by a nitrogen-containing heterocyclic compound, the synthesized crystals are more researched on ferroelectricity, and less systematically researched on fluorescence properties.
[0004] This application further enriches the photoelectric performance research of nitrogen-containing heterocyclic organic-inorga

Method used

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  • Preparation method of 1, 2-dimethyl imidazole cadmium chloride perovskite material and application
  • Preparation method of 1, 2-dimethyl imidazole cadmium chloride perovskite material and application
  • Preparation method of 1, 2-dimethyl imidazole cadmium chloride perovskite material and application

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Experimental program
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Example Embodiment

[0028] Example 1 Sample preparation

[0029] Mix 1,2-dimethylimidazole, cadmium source, formic acid, hydrochloric acid, and methanol in a certain proportion to obtain a precursor solution. Add the precursor solution to a 20 mL test tube. After volatilizing at the crystallization temperature for a period of time, it is filtered, Wash and dry to obtain colorless lump (C 5 N 2 H 9 )CdCl 3 Crystal samples. Table 1 shows the relationship between the type and ratio of raw materials in the precursor mixture, crystallization temperature, crystallization time and sample number.

[0030] Table 1 The relationship between sample synthesis conditions and sample number

[0031]

Example Embodiment

[0032] Example 2 Analysis of the crystal structure of the sample

[0033] Single crystal X-ray diffraction and powder X-ray diffraction methods were used to analyze the structure of samples 1#~10#.

[0034] Among them, single crystal X-ray diffraction was performed on the Rigaku Mercury CCD X-ray single crystal diffractometer from Bruker, Germany. The crystal size is 0.12×0.10×0.12mm 3 ; Data collection temperature is 293K, diffraction light source is graphite monochromatic Mo-Kα rays The scanning method is ω-2θ; the data adopts the Multi-Scan method for absorption correction processing. The structure analysis is done using the SHELXTL-97 program package; the direct method is used to determine the position of the heavy atom, and the difference Fourier synthesis method is used to obtain the remaining atomic coordinates; 2 The full-matrix least-squares method refines the coordinates and anisotropic thermal parameters of all atoms.

[0035] The powder X-ray diffraction was carried ou...

Example Embodiment

[0043] Example 3 Fluorescence test experiment and results

[0044] The specific fluorescence test experiment of sample 1# is as follows: use QM / TM fluorescence spectrophotometer to measure the fluorescence excitation and emission spectra of the solution in which sample 1# is dissolved, and dissolve sample 1# and sample 1# in the above solvent respectively to make 1mg / 3ml Measure the emission spectra of different solvents under the excitation of 315nm light. Choose the solution with N,N-dimethylformamide as the solvent as a typical representative, add 60μL of acetonitrile, and measure the change of fluorescence intensity under different adding time.

[0045] The test result is like image 3 with 4 Shown, indicating that the compound (C 5 N 2 H 9 )CdCl 3 The crystal has strong fluorescence in the solution, and acetonitrile can quench the fluorescence of sample 1# solution.

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Abstract

The invention discloses a novel ABX3 type hybridization perovskite crystalline material, a preparation method thereof and an application of the material, and belongs to an orthorhombic crystal system. The chemical formula of the crystalline material is (C5N2H9) CdCl3, a space group of the crystalline material is Pnma, cell parameters of the crystalline material are a= 11.2-11.3A, b= 7.1-7.2 A, c=12.4-12.5 A, wherein alpha=beta=gamma= 90 degrees, and Z=4. The crystalline material has high fluorescence effect in solvents. Acetonitrile has quenching effect on solution dissolving crystals, and the crystalline material has wide application prospect in chemical sensors, luminescent systems, biomedical sciences, negative ion detection and the like.

Description

technical field [0001] This application relates to a new type of ABX 3 Type perovskite crystal materials and their synthesis methods. Background technique [0002] ABX 3 The remarkable feature of the organic-inorganic hybrid perovskite crystal material is that it has excellent photoelectric properties. It is an important optical, electrical, and magnetic multifunctional material. and so on are widely used. The preparation and performance studies of hybrid perovskite crystal materials have attracted extensive interest from researchers at home and abroad. Currently, extensively researched ABX 3 type perovskite is mainly CH 3 NH 3 wxya 3 (X=Cl, Br, I), the photoelectric conversion efficiency of solar cell devices made of such crystal materials has exceeded 20%. [0003] However, when the organic amine at the A position is replaced by a nitrogen-containing heterocyclic compound, the synthesized crystals are more ferroelectric and less systematically studied about the flu...

Claims

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Application Information

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IPC IPC(8): C07F3/08C09K11/06G01N21/64
CPCC07B2200/13C07F3/003C09K11/06C09K2211/1044C09K2211/188G01N21/6428G01N2021/6432
Inventor 宋俊玲楚凯斌
Owner JIANGNAN UNIV
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