Perovskite nanowire and preparation method and application thereof

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

Active Publication Date: 2021-07-13
JILIN UNIV
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  • 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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  • Perovskite nanowire and preparation method and application thereof
  • Perovskite nanowire and preparation method and application thereof
  • Perovskite nanowire and preparation method and application thereof

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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 suitable for the technical field of optical materials, and provides a perovskite nanowire and a preparation method and application thereof.The preparation method of the perovskite nanowire comprises the following steps: making octadecene, oleic acid and a cesium source heated and dissolved to obtain a precursor solution; mixing lead chloride, oleic acid, rare earth acetate, octadecene, caprylic acid, octylamine and oleylamine to obtain a transparent solution; and injecting the precursor solution into the transparent solution, performing low-temperature cooling, and dispersing the precursor solution into a non-polar solvent to obtain the perovskite nanowire. The preparation method provided by the embodiment of the invention is simple in operation, less in time consumption and low in energy consumption, and the prepared blue-violet light CsPbCl3 perovskite nanowire is stable in sample phase, uniform in morphology and size, narrow in half-peak width, high in luminous color purity, few in surface defect and high in 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 Applications(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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