Perovskite nanosheet material as well as preparation method and application thereof

A technology of nanosheets and perovskites, applied in the field of materials, can solve the problems of non-uniform size of perovskite nanosheets and incomplete symmetry of luminescence peaks, and achieve the effects of easy control, uniform thickness, and great application value

Inactive Publication Date: 2019-05-28
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, it has been reported that the formation of CsPbCl can be regulated by using zinc chloride salt, changing the carbon chain length of the ligand, and solvent induction. x Br 3-x nanosheets, but the size of the obtained perovskite nanosheets is not uniform enough, the luminescence peaks are not completely symmetrical, and the half-peak width is 20-50nm

Method used

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  • Perovskite nanosheet material as well as preparation method and application thereof
  • Perovskite nanosheet material as well as preparation method and application thereof
  • Perovskite nanosheet material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Add 0.203g Cs to the mixture of 10mL octadecene and 0.625mL oleic acid 2 CO 3 , heated to 100°C under the protection of nitrogen, kept for 30min, and when Cs 2 CO 3 Dissolve completely, raise the temperature to 150°C, and keep it warm for 30 minutes to obtain the cesium oleate precursor; add 0.099g ferric bromide powder to the mixture of 5mL octadecene, 1.3mL oleic acid and 1.3mL oleylamine, at room temperature 400r / Stir until the ferric bromide powder is completely dissolved, then add 0.069g of lead bromide to the obtained mixed solution, raise the temperature to 100°C under the protection of nitrogen, keep it warm for 0.5h, and wait until the powder is completely dissolved to obtain a mixed solution of iron and lead;

[0028] (2) Raise the temperature of the above-mentioned iron-lead mixture to 140°C, raise the temperature of the cesium oleate precursor to 100°C, take 0.4mL into the iron-lead mixture, keep it warm at 140°C for 5s, and then cool it in an ice-wat...

Embodiment 2

[0030] (1) Add 0.203g Cs to the mixture of 10mL octadecene and 0.625mL oleic acid 2 CO 3 , heated to 130°C under the protection of nitrogen, and kept for 30min, until Cs 2 CO 3 Dissolve completely, raise the temperature to 150°C, and keep it warm for 30 minutes to obtain the precursor of cesium oleate; add 0.055g ferric bromide powder to the mixture of 5mL octadecene, 0.9mL oleic acid and 0.9mL oleylamine, and heat at room temperature at 600r / Stir for 1 min until the iron bromide powder is completely dissolved, then add 0.069g of lead bromide to the obtained mixed solution, raise the temperature to 120°C under the protection of nitrogen, keep it warm for 0.5h, and wait until the powder is completely dissolved to obtain the iron-lead mixed solution;

[0031] (2) Raise the temperature of the above-mentioned iron-lead mixture to 140°C, raise the temperature of the cesium oleate precursor to 100°C, take 0.4mL into the iron-lead mixture, keep it warm at 140°C for 5s, and then co...

Embodiment 3

[0033] (1) Add 0.203g Cs to the mixture of 10mL octadecene and 0.625mL oleic acid 2 CO 3 , heated to 130°C under the protection of argon, and kept for 30min, until Cs 2 CO 3 Dissolve completely, raise the temperature to 150°C, and keep it warm for 30 minutes to obtain the cesium oleate precursor; add 0.099g ferric bromide powder to the mixture of 5mL octadecene, 1.3mL oleic acid and 1.3mL oleylamine, and heat it at room temperature at 600r / Stir until the ferric bromide powder is completely dissolved, then add 0.069g of lead bromide to the obtained mixed solution, raise the temperature to 100°C under the protection of argon, keep it warm for 0.5h, and wait until the powder is completely dissolved to obtain a mixed solution of iron and lead;

[0034] (2) Raise the temperature of the above-mentioned iron-lead mixture to 130°C, raise the temperature of the cesium oleate precursor to 100°C, take 0.4mL into the iron-lead mixture, keep it warm at 130°C for 5min, and then bathe in ...

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Abstract

The invention belongs to the field of materials, and specifically relates to a perovskite nanosheet material as well as a preparation method and application thereof. The preparation method of the perovskite nanosheet material comprises the following steps: (1) mixing cesium carbonate powder with octadecene and oleic acid, dissolving the cesium carbonate powder by heating to 100-130 DEG C under aninert atmosphere, rising the temperature of a system to 140-160 DEG C and reacting for 10-60 min to obtain a cesium oleic acid precursor; mixing iron bromide power with octadecene, oleic acid and oleylamine, dissolving, then adding lead bromide power into an obtained mixed solution, and dissolving the lead bromide powder by heating to 100-120 DEG C under an inert atmosphere so as to obtain an ironand lead mixed solution; and (2) heating the cesium oleic acid precursor to 80-100 DEG C, uniformly mixing with the iron and lead mixed solution, performing a thermal insulation reaction for 5 s-5 min at 120-140 DEG C, cooling and then performing centrifugal separation. Therefore, the obtained perovskite nanosheet material has relatively short light-emitting wavelength; the light-emitting peak position is at about 436 nm; the half peak width is only 14 nm; the light-emitting peak is fully symmetric; and the two-dimensional perovskite nanosheet material is very uniform in size and thickness, and is easy to control.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a perovskite nanosheet material and a preparation method and application thereof. Background technique [0002] In recent years, semiconductor quantum dots have attracted much attention in the field of optoelectronics and display. Among them, all-inorganic lead-containing halide perovskite quantum dots have become a new generation of highly competitive quantum dots due to their excellent photoelectric properties such as high fluorescence efficiency, extremely narrow luminescence half-peak width, adjustable bandgap width, and low defect density. Force luminescent material. By changing the ratio of the halide ions, the emission spectrum of the all-inorganic perovskite quantum dot can cover the entire visible light range. These excellent properties make it have potential application value in solar cells, light-emitting diodes, lasers and other fields. [0003] At present, mos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/66C01G21/00B82Y30/00B82Y40/00
Inventor 解荣军萧晓琳李烨
Owner XIAMEN UNIV
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