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CsPbBr3 Nanocrystal and method to synthesize CsPbBr3 nanocrystals of different dimensions based on microwave method

A nanocrystal and microwave method technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve fine control, simple and controllable process, and good repeatability.

Active Publication Date: 2018-05-29
NINGBO UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the controllable synthesis of CsPbBr with different dimensions by microwave method 3 Nanocrystals have rarely been reported

Method used

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  • CsPbBr3 Nanocrystal and method to synthesize CsPbBr3 nanocrystals of different dimensions based on microwave method
  • CsPbBr3 Nanocrystal and method to synthesize CsPbBr3 nanocrystals of different dimensions based on microwave method
  • CsPbBr3 Nanocrystal and method to synthesize CsPbBr3 nanocrystals of different dimensions based on microwave method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 690mg PbBr 2 , 25ml of octadecene (ODE) and 25ml of diethylene glycol butyl ether (DGBE) were placed in a three-necked flask, heated to 120°C for 1 hour under vacuum, and injected with 9ml of dry oleic acid (OA) and 1ml of oleylamine (OAm), Then warm up to 150°C until PbBr 2 After completely dissolving, cool naturally to room temperature for later use.

[0034] Take 0.8g Cs 2 CO 3 , 2.4ml OA and 30ml ODE were placed in a three-necked flask, heated to 120°C for 1 hour under vacuum, and then heated to 150°C until Cs 2 CO 3 Cool to room temperature after complete dissolution. The Cs precursor needs to be heated to 100 °C before use to avoid the precipitation of Cs-oleate from the ODE.

[0035] Take 5ml of the above PbBr 2 The precursor and 0.4ml of the above Cs precursor were placed in a 2 Mix in a 10ml glass bottle of gas, and then put it into a microwave oven to synthesize at 400W. After 1min, take out the glass bottle and put it in ice water to cool down, s...

Embodiment 2

[0038] The only difference with embodiment 1 is that this embodiment PbBr 2 In the preparation of the precursor, 8 ml of oleic acid (OA) and 2 ml of oleylamine (OAm) were used, and the others were the same as those in Example 1, which will not be repeated here.

[0039] The CsPbBr prepared by this embodiment 3 Scanning electron microscope (SEM) and transmission electron microscope (TEM) images of perovskite nanocrystals at different magnifications Figure 5 with Image 6 , indicating that the as-prepared material is 1D CsPbBr 3 Nano stave.

Embodiment 3

[0041] The only difference with embodiment 1 is that this embodiment PbBr 2 In the preparation of the precursor, 6.5 ml of oleic acid (OA) and 4 ml of oleylamine (OAm) were used, and the others were the same as those in Example 1, which will not be repeated here.

[0042] The CsPbBr prepared by this embodiment 3 Scanning electron microscope (SEM) and transmission electron microscope (TEM) images of perovskite nanocrystals at different magnifications Figure 7 with Figure 8 , indicating that the as-prepared material is a 2D CsPbBr 3 Nanosheets.

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Abstract

The invention relates to CsPbBr3 nanocrystal and a method to synthesize CsPbBr3 nanocrystals of different dimensions based on a microwave method and belongs to the technical field of material preparation. The CsPbBr3 nanocrystal has adjustable dimensions including 0 dimension, 1-dimension and two-dimension. The method includes: heating Cs2CO3, oleic acid and octadecene to 100-130 DEG C, holding the temperature in vacuum, and heating until Cs2CO3 is completely dissolved to obtain a Cs precursor; heating PbBr2, 1-octadecene and diethylene glycol monobutyl ether to 100-130 DEG C, holding the temperature in vacuum, injecting the dried oleic acid and oleyl amine in the volume ratio of (1-15):1, heating until PbBr2 is completely dissolved to obtain PbBr2 precursor; mixing the Cs precursor and the PbBr2 precursor under nitrogen protection, synthesizing under microwave, cooling with ice water, centrifugally washing, and re-dispersing in hexane or methylbenzene for preservation. The method enables CsPbBr3 perovskite nanocrystals of different dimensions to be quickly synthesized in a controllable manner.

Description

technical field [0001] The present invention relates to a kind of CsPbBr 3 Nanocrystalline and CsPbBr with different dimensions 3 A method for synthesizing nanocrystals belongs to the technical field of material preparation. Background technique [0002] All inorganic CsPbX 3 (X=Br, Cl, I) perovskite due to its excellent optical properties, such as: high luminous efficiency, continuously adjustable luminous wavelength, good color purity, fast fluorescence lifetime and fast electron mobility, etc., so It has good application prospects in the fields of solar cells, light-emitting diodes, lasers, and photoelectric detection. Based on the fact that nanomaterials of different sizes have different properties and applications, the controllable synthesis of all-inorganic perovskite materials of different sizes is particularly important to promote their applications. However, the current control over the synthesis of all-inorganic perovskites with different sizes is far from suff...

Claims

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Application Information

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IPC IPC(8): C01G21/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G21/006C01P2002/72C01P2004/03C01P2004/04C01P2004/16C01P2004/64
Inventor 郑金桔刘文娜高凤梅杨为佑
Owner NINGBO UNIVERSITY OF TECHNOLOGY
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