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A kind of perovskite nanowire and its preparation method and application

A nanowire, perovskite technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc.

Active Publication Date: 2022-01-11
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Although there have been reports on the successful preparation of green CsPbBr 3 The case of nanowires, but based on CsPbCl in blue-violet light 3 nanowires have not been reported, therefore, CsPbCl 3 The synthesis method and optical properties of the nanowires need to be further studied

Method used

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  • A kind of perovskite nanowire and its preparation method and application
  • A kind of perovskite nanowire and its preparation method and application
  • A kind of perovskite nanowire and its preparation method and application

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Embodiment 1

[0028] This embodiment provides a kind of preparation method of perovskite nanowire, it comprises the following steps:

[0029] S1, join 10mL octadecene, 1mL oleic acid, 0.4g cesium carbonate in the 50mL three-necked bottle, in N 2 Heating to 120°C under the atmosphere, stirring the solution until it dissolves and turns light yellow, the resulting precursor solution is ready for use in subsequent experiments.

[0030] S2, 0.2mmol lead chloride, 0.5mL oleic acid, 0.025mmol Eu(AcO) 3 Add it to a three-necked flask equipped with 5mL of octadecene and pump it for 30mins, then feed it with N 2 , when heated to 130°C, add 0.4mL octanoic acid, 0.5mL octylamine and 0.8mL oleylamine, and stir for 30mins to obtain a clear transparent solution.

[0031] S3. Heat up to 140°C, inject 0.7mL of precursor into 6.3mL of transparent solution, and keep it at 140°C for 50 minutes, then quickly cool to room temperature with an ice-water bath, and then centrifugally disperse at a speed of 8000rad...

Embodiment 2

[0033] Adopt the same process of embodiment 1, the difference is that the Eu(AcO) in the step 2 of embodiment 1 3 The amount was changed to 0.05mmol, and other conditions remained the same.

Embodiment 3

[0035] Adopt the same process of embodiment 1, the difference is that the Eu(AcO) in the step 2 of embodiment 1 3 The amount was changed to 0.2mmol, and other conditions remained the same.

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Abstract

The invention is applicable to the technical field of optical materials, and provides a perovskite nanowire and its preparation method and application. The preparation method of the perovskite nanowire includes the following steps: heating octadecene, oleic acid and a cesium source Dissolve to obtain a precursor solution; mix lead chloride, oleic acid, rare earth acetate, octadecene, octanoic acid, octylamine and oleylamine to obtain a transparent solution; inject the precursor solution into the transparent solution and cool at low temperature , and dispersed in a non-polar solvent to obtain the perovskite nanowires. The preparation method provided by the embodiment of the present invention is simple to operate, less time-consuming, and low energy consumption, and the blue-violet light CsPbCl prepared by it is 3 The sample of perovskite nanowire has stable phase, uniform shape and size, narrow half-peak width, high luminous color purity, less surface defects, and high quantum efficiency.

Description

technical field [0001] The invention belongs to the technical field of optical materials, and in particular relates to a perovskite nanowire and a preparation method and application thereof. Background technique [0002] Metal halide perovskite nanocrystals (ABX 3 ) has the advantages of large absorption coefficient, tunable emission wavelength, long diffusion length, and high optical gain. These characteristics make it widely used in solar cells, light-emitting diodes, photodetectors, and lasers. Unlike traditional II-VI, III-V, and IV-VI semiconductor nanocrystals, perovskite nanocrystals have softer ionic lattices. This ionic nature makes it easy to undergo anion exchange reactions, resulting in particles with different components (such as CsPbCl 3 , CsPbBr 3 , CsPbI 3 ) and their mixed anionic alloys. However, their ionic nature also makes perovskite growth extremely fast. The completion time of nanocrystal growth varies from less than one second to several seconds....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G21/00C09K11/66B82Y30/00B82Y40/00
CPCC01G21/006C09K11/665B82Y30/00B82Y40/00C01P2002/72C01P2004/04
Inventor 白雪武秀峰徐文宋宏伟董彪徐琳周东磊
Owner JILIN UNIV
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