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A kind of synthetic method of inorganic perovskite nanosheet

A synthesis method and nanosheet technology, applied in inorganic chemistry, nanotechnology, chemical instruments and methods, etc., can solve the problems of complex synthesis technology, low yield, harsh experimental conditions, etc., and achieve strong controllability and high yield. , the effect of simple operation

Active Publication Date: 2019-06-14
HEBEI UNIV OF TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The present invention aims at the deficiencies of current inorganic perovskite nanosheet synthesis technology complex, harsh experimental conditions and low yield, and provides an inorganic perovskite CsPbX 3 Synthetic method of (X=Cl, Br, I) nanosheets

Method used

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  • A kind of synthetic method of inorganic perovskite nanosheet
  • A kind of synthetic method of inorganic perovskite nanosheet
  • A kind of synthetic method of inorganic perovskite nanosheet

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Embodiment 1

[0039] Step 1. Weigh 1.8 mmol of cesium carbonate and add it to a three-necked flask containing 21 mL of octadecene and 3.0 mL of oleic acid, stir at 147°C for 17 minutes to completely dissolve cesium carbonate, and then naturally cool to room temperature to form a precursor of cesium solution.

[0040] Step 2. Weigh 2.0mmol lead bromide and add it to a three-necked flask containing 3.0mL oleic acid, 3.0mL oleylamine and 21mL octadecene, stir at 116°C for 23min to completely dissolve the lead bromide, then cool naturally to At room temperature, a precursor solution of lead bromide is formed.

[0041] Step 3. Measure 2.4 mL of the solution obtained in step 1 and add it into the three-necked flask in step 2, mix well and ultrasonicate at room temperature for 15 min.

[0042] Step 4. Place the mixed solution obtained in Step 3 in a reaction kettle, heat and react at a heating temperature of 100° C. for 60 minutes, and cool down to room temperature naturally after the reaction. ...

Embodiment 2

[0047] Change the cesium carbonate add-on in step 1 in embodiment 1 to 2.4mmol, and other operations are all the same as in embodiment 1, and the obtained CsPbBr 3 Nano sheet is the same as embodiment 1.

Embodiment 3

[0049] Change the amount of lead bromide in step 2 in embodiment 1 to 2.7mmol, and other operations are the same as in embodiment 1, and the obtained CsPbBr 3 Nano sheet is the same as embodiment 1.

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Abstract

The invention relates to a synthesizing method of inorganic perovskite nanosheets. The method includes: adding the precursor solution of cesium into the precursor solution of lead halide, performing ultrasonic treatment for 10-30 minutes to obtain a mixed solution, transferring the mixed solution into a reaction kettle, performing reaction under 60-150 DEG C for 30-420 minutes, and naturally cooling to obtain reactants; performing centrifugal processing and washing to obtain the inorganic perovskite CsPbX3 nanosheets. The method has the advantages that the method is simple to operate and does not need harsh experiment conditions, and the prepared nanosheets are uniform in size, high in controllability and high in yield, and the quantum efficiency of the nanosheets reaches up to 48%.

Description

technical field [0001] The technical solution of the present invention relates to a method for synthesizing perovskite nanosheets, specifically a method for synthesizing inorganic perovskite nanosheets with high yield and uniform size, and belongs to the technical field of new material preparation and nanomaterials. Background technique [0002] In recent years, the research on perovskite-based solar cells has attracted much attention. Inorganic perovskite material CsPbX 3 (X=Cl, Br, I) has gradually aroused people's research enthusiasm because of its better stability than organic-inorganic hybrid perovskite materials. Synthesis of inorganic perovskite nanomaterials, especially inorganic perovskite quantum dots (Song J, Li J, LiX, et al. Adv. Mater. 2015, 27, 7162), inorganic perovskite nanowires (Zhang D, The successful preparation of Eaton S W, Yu Y, et al. J. Am. Chem. Soc, 2015, 137, 9230) has greatly promoted the application of inorganic perovskite nanocrystals in sol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00B82Y40/00
CPCB82Y40/00C01G21/006C01P2002/34C01P2002/72C01P2002/84C01P2004/04C01P2004/24C01P2004/64C01P2006/80
Inventor 林靖翟伟黄阳何鑫李巧灵唐成春
Owner HEBEI UNIV OF TECH
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