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Preparation method and application of CsPbX3@pyrophyllite composite material

A technology of composites and nanocrystals, applied in lead compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high synthesis cost, undeveloped application fields, and difficulty in industrial production, and achieve low cost and good optical effects , the effect of good optical performance

Active Publication Date: 2021-08-27
WENZHOU UNIVERSITY
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  • Summary
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Problems solved by technology

But they are expensive to synthesize and difficult to achieve industrial production
Phyllosilicates are abundant, and due to their unique layered structure, rich silica-alumina composition, and special physical and chemical properties, they are expected to establish a fundamental relationship between the natural mineral structure and the properties of all-inorganic perovskite nanocrystals. The connection, its application field remains to be developed

Method used

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  • Preparation method and application of CsPbX3@pyrophyllite composite material
  • Preparation method and application of CsPbX3@pyrophyllite composite material
  • Preparation method and application of CsPbX3@pyrophyllite composite material

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Experimental program
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Effect test

Embodiment 1-5

[0030] Embodiment 1-5: prepare CsPbBr 3 @pyrophyllite complex

[0031] 0.9g Cs 2 CO 3 , 3mL of oleic acid and 45mL of 1-octadecene were added to a 100mL three-neck round bottom flask, and stirred at 120°C for 1h under a nitrogen atmosphere to remove water and oxygen, and then the temperature was raised to 150°C for 5 minutes to prepare Precursor solution, lower the temperature to 100°C for use.

[0032] 0.07g PbBr 2 , 0.5mL oleic acid, 0.5mL oleylamine and 5mL 1-octadecene were mixed in a 30mL three-necked flask, stirred at 120°C for 1h under nitrogen to remove water and oxygen, and the temperature was raised to 150°C to maintain 0- For 15 s, 0.4 mL of hot cesium oleate precursor solution was quickly injected into the flask with a syringe. Subsequently, the reaction was quenched by an ice-water bath until cooled to room temperature. The prepared nanocrystalline crude solution was purified by adding an equal volume of methyl acetate, centrifuged at 8000rpm for 10min, discar...

Embodiment 6

[0038] Embodiment 6: Preparation of CsPbCl 2 Br@pyrophyllite complex

[0039] 0.9g Cs 2 CO 3 , 3mL of oleic acid and 45mL of 1-octadecene were added to a 100mL three-neck round bottom flask, and stirred at 120°C for 1h under a nitrogen atmosphere to remove water and oxygen, and then the temperature was raised to 150°C for 5 minutes to prepare Precursor solution, lower the temperature to 100°C for use.

[0040] 0.033g PbCl 2 , 0.023g PbBr 2 , 0.5mL oleic acid, 0.5mL oleylamine and 5mL 1-octadecene were mixed in a 30mL three-necked flask, stirred at 120°C for 1h under nitrogen to remove water and oxygen, and the temperature was raised to 150°C to maintain 0- For 15 s, 0.4 mL of hot cesium oleate precursor solution was quickly injected into the flask with a syringe. Subsequently, the reaction was quenched by an ice-water bath until cooled to room temperature. The prepared nanocrystalline crude solution was purified by adding an equal volume of methyl acetate, centrifuged a...

Embodiment 7

[0041] Embodiment 7: Preparation of CsPbCl 1.5 Br 1.5 @pyrophyllite complex

[0042] 0.9g Cs 2 CO 3 , 3mL of oleic acid and 45mL of 1-octadecene were added to a 100mL three-neck round bottom flask, and stirred at 120°C for 1h under a nitrogen atmosphere to remove water and oxygen, and then the temperature was raised to 150°C for 5 minutes to prepare Precursor solution, lower the temperature to 100°C for use.

[0043] 0.02g PbCl 2 , 0.035g PbBr 2 , 0.5mL oleic acid, 0.5mL oleylamine and 5mL 1-octadecene were mixed in a 30mL three-necked flask, stirred at 120°C for 1h under nitrogen to remove water and oxygen, and the temperature was raised to 150°C to maintain 0- For 15 s, 0.4 mL of hot cesium oleate precursor solution was quickly injected into the flask with a syringe. Subsequently, the reaction was quenched by an ice-water bath until cooled to room temperature. The prepared nanocrystalline crude solution was purified by adding an equal volume of methyl acetate, centri...

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Abstract

The invention discloses a preparation method and application of a CsPbX3@pyrophyllite composite material, and the preparation method comprises the following steps: mixing a CsPbX3 nanocrystalline solution with pyrophyllite to enable the molar ratio of CsPbX3 nanocrystalline to pyrophyllite to be 0.1-0.5, placing the mixture in a fuming cupboard, stirring at the stirring speed of 200-500rpm under the condition of starting ventilation to enable the solvent to be fully volatilized, and obtaining the CsPbX3@pyrophyllite composite material. The CsPbX3@pyrophyllite composite material has good optical performance and excellent water stability, thermal stability, light irradiation stability and storage stability. The invention provides an application of the CsPbX3@pyrophyllite composite material in display illumination of a white light LED or a backlight source.

Description

technical field [0001] The present invention relates to a kind of CsPbX 3 Preparation method of @pyrophyllite composite material and its application in white LED and backlight display lighting. Background technique [0002] In recent years, all-inorganic lead halide cesium perovskite nanocrystals have been widely reported due to their numerous advantages in optical properties, including high fluorescence quantum yield (energy higher than 90%), high defect tolerance, emission can be Tuning (410–700nm), narrow half-peak width (12–42nm), adjustable band gap, high carrier mobility, and better single-phase stability than bulk materials. All inorganic CsPbX 3 Compared with organic-inorganic hybrid perovskites, nanocrystals are more resistant to environmental erosion and have better optoelectronic properties. The rapid development of perovskite LEDs has prompted the emergence of a new generation of low-cost and high-performance LEDs. Its application fields Including lighting, di...

Claims

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Application Information

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IPC IPC(8): C01G21/00C01B33/26
CPCC01G21/00C01G21/006C01B33/26C01P2002/72C01P2002/87C01P2006/60
Inventor 向卫东袁琳梁晓娟
Owner WENZHOU UNIVERSITY
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