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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  • Abstract
  • Description
  • Claims
  • Application Information

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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-inorganic hybrid perovskite by synthesizing a new type of ABX at room temperature 3 type organic-inorganic hybrid perovskite (C 5 N 2 h 9 )CdCl 3 , the preparation conditions are mild, the preparation method is simple, large-scale crystals can be prepared, and there is strong fluorescence in the solvent. The preparation method and related work have not been reported so far.

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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Embodiment 1

[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 into a 20mL test tube, volatilize at the crystallization temperature for a period of time, filter, Washed and dried to obtain a colorless block (C 5 N 2 h 9 )CdCl 3 crystal sample. Table 1 shows the relationship between the types and proportions of raw materials in the precursor liquid mixture, crystallization temperature, crystallization time and sample numbers.

[0030] Table 1 Relationship between sample synthesis conditions and sample numbers

[0031]

Embodiment 2

[0032] The crystal structure analysis of embodiment 2 sample

[0033] The structures of samples 1# to 10# were analyzed by single crystal X-ray diffraction and powder X-ray diffraction.

[0034] The single crystal X-ray diffraction was performed on a Rigaku Mercury CCD type X-ray single crystal diffractometer from Bruker, Germany. The crystal size is 0.12×0.10×0.12mm 3 ; The data collection temperature is 293K, and the diffraction light source is Mo-Kα ray monochromated by graphite The scanning method is ω-2θ; the data is processed by the Multi-Scan method for absorption correction. Structural analysis was completed using the SHELXTL-97 program package; the position of the heavy atom was determined by the direct method, and the coordinates of the remaining atoms were obtained by the difference Fourier synthesis method; 2 The full-matrix least-squares method was used to refine all atomic coordinates and anisotropic thermal parameters.

[0035] Powder X-ray diffraction wa...

Embodiment 3

[0043] Embodiment 3 fluorescence test experiment and result

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

[0045] Test results such as image 3 and 4 Shown, indicating that the compound (C 5 N 2 h 9 )CdCl 3 Crystals have strong fluorescence in solution, and acetonitrile has a fluorescence quenching effect on 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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