Perovskite single crystal nanoring and preparation method and application thereof

A technology of single crystal nanometer and perovskite, which is applied in nanotechnology, nanotechnology, separation methods, etc., and can solve problems such as high energy consumption and complicated preparation process

Pending Publication Date: 2020-11-10
INST OF CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The current method for the preparation of single crystal nanorings of inorganic materials is mainly based on hydrothermal method or vapor deposition method, which has the disadvantages of high energy consumption and complicated preparation process.

Method used

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  • Perovskite single crystal nanoring and preparation method and application thereof
  • Perovskite single crystal nanoring and preparation method and application thereof
  • Perovskite single crystal nanoring and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1, preparation lead cesium iodide perovskite single crystal nano ring

[0055] The lead cesium iodide perovskite single crystal nanorings were prepared according to the following steps:

[0056] (1) Place the selected monocrystalline silicon wafer substrate on a custom-made polytetrafluoroethylene cleaning rack and put it into an ultrasonic instrument for cleaning. Ultrasonic cleaning was performed with deionized water, absolute ethanol, and acetone for 15 minutes respectively, and the base sheet was blown dry with nitrogen gas after cleaning. Part of the substrate was subjected to surface hydrophilic treatment with a UV-ozone meter at 200W power for 10 minutes; another part of the substrate was subjected to hydrophobic treatment, mixed and stirred with 100 μL octadecyl trichlorosilicon and 100 mL toluene solution, and the cleaned substrate was placed on the Soak in the prepared solution for 1 hour, then ultrasonically clean the base sheet with dichlorometha...

Embodiment 2

[0062] Embodiment 2, preparation lead cesium iodide perovskite single crystal nano ring

[0063] The perovskite single-crystal nanorings were prepared in the same manner as in Example 1, except that the concentration of the precursor solution was changed to 0.4 mol / L (lead iodide and cesium iodide remained at a ratio of 1:1). The average thickness and average radius of the obtained perovskite single crystal nanorings are basically similar to those of Example 1, and the distribution density of the product on the substrate is smaller than that of Example 1.

Embodiment 3

[0064] Embodiment 3, preparation lead cesium iodide perovskite single crystal nano ring

[0065] The lead cesium iodide perovskite single crystal nanorings were prepared according to the same method as in Example 1, except that the acetonitrile solvent and the precursor solution were mixed rapidly at a ratio of 1:1.5. The resulting mixed solvent needs to be added to the two-dimensional confinement space of the substrate within 10 minutes, and the average thickness and average radius of the obtained lead cesium iodide perovskite single crystal nanoring are smaller than that of Example 1, and the distribution density of the product on the substrate is the same as Example 1 is similar.

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Abstract

The invention discloses a perovskite single crystal nanoring and a preparation method and application thereof. The perovskite single crystal nanoring has an annular morphology and a single crystal structure, is an independent and continuous nanoring, is regular in morphology, has no visible surface defect structures such as grain boundaries and pores, and has good crystal quality. A two-dimensional confinement space is formed by a substrate, a metastable solution formed by the perovskite precursor solution and a polar organic solvent grows in the two-dimensional confinement space to form a single-crystal nanoring structure, the perovskite single-crystal nanoring is prepared through the two-dimensional confinement space of the substrate and solvent regulation and control engineering, and compared with other methods, the invention is small in energy consumption, low in cost and suitable for industrial production. The invention is low in cost, simple in process, clear in product, single in product configuration and suitable for large-scale production; the perovskite single crystal nanoring disclosed by the invention is of a single crystal structure, has the advantages of higher crystal quality, no crystal boundary and small defect density, and has huge potential application value in the fields of laser and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a perovskite single crystal nanoring, a preparation method and application thereof. Background technique [0002] Because nanoscale crystal structures often have unique physical and chemical properties, nanomaterials (zero-dimensional quantum dots, one-dimensional nanowires, two-dimensional nanosheets, etc.) play an important role in basic theoretical research and device application technology. effect. The unique morphology and electronic structure of two-dimensional materials can adjust or change the reaction process of single-atom catalysts. Secondly, two-dimensional materials have a large specific surface area, which increases the loading capacity of single atoms. If it is a single-layer two-dimensional material, the adsorption and diffusion of reactive molecules can be promoted simultaneously on the upper and lower sides. In addition, nanomater...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B81B1/00B81C1/00B82Y30/00B82Y40/00
CPCB81B1/002B81C1/00031B81C1/00103B82Y40/00B82Y30/00B81B2203/0376
Inventor 万立骏陈尧轩胡劲松
Owner INST OF CHEM CHINESE ACAD OF SCI
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