Coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and preparation method thereof

A technology of nanocrystals and production methods, applied in chemical instruments and methods, semiconductor devices, luminescent materials, etc., to achieve the effect of excellent red fluorescence, good optoelectronic application prospects, and strong yellow fluorescence

Inactive Publication Date: 2021-07-09
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No new undoped and antimony-doped non-lead all-inorganic indium-based zero-dimensional perovskite nanocrystals containing coordinated water have not been reported yet.

Method used

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  • Coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and preparation method thereof
  • Coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and preparation method thereof
  • Coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and preparation method thereof

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preparation example Construction

[0030] Cs 2 InBr 5 (H 2 O) The preparation method of the material is: first, cesium acetate and indium acetate are stirred and mixed according to the required amount, ensuring that the mol ratio of cesium and indium is 0.9:0.45, then adding 1-octadecene, oleic acid, oleylamine, and stirring Mix and apply vacuum at 100-115°C for 40-90 min. Then, blow nitrogen, raise the temperature to 170-190°C at 4-8°C / min, inject trimethylbromosilane at 175±5°C, and when the temperature reaches 180-190°C, quickly ice-bath and cool to room temperature. Finally, centrifuge at 9000±1500 rpm for 5-30 minutes to remove the supernatant, then wash with toluene 1-4 times, and centrifuge at 10000±500 rpm for 10±6 minutes to remove the supernatant. Crush the precipitate and apply it on the surface of the attachment to fully expose it to saturated water vapor, keep it for 3 minutes, then disperse the precipitate in n-hexane, centrifuge at 6000±1000 rpm for 10±6 minutes to remove the precipitate, and ...

Embodiment 1

[0034] First, add 96.0 mg of cesium acetate, 131.0 mg of indium acetate and 13.5 mg of antimony acetate into a 50 ml flask, then add 10 ml of 1-octadecene, 2.9 ml of oleic acid, and 0.65 ml of oleylamine, Stir and mix, vacuumize at 105°C for 1h; then, pass nitrogen gas, raise the temperature to 175°C at 4-8°C / min, inject 0.45ml of trimethylchlorosilane into the flask, and when the temperature reaches 185°C, quickly ice-bath , cooled to room temperature; finally, centrifuge the contents of the flask at 10,000 rpm for 10 minutes to remove the supernatant, crush the precipitate and apply it on the surface of the attachment to fully expose it to saturated water vapor, keep it for 3 minutes, and then Wash once with toluene, centrifuge at 10,000 rpm for 5 minutes, remove the supernatant again, and then disperse the precipitate in n-hexane; centrifuge at 5,000 rpm for 5 minutes to remove the precipitate, and the average side length is about 13nm Cs 2 InCl 5 (H 2 O): Sb nanocrystal...

Embodiment 2

[0036] First, add 172.0 mg of cesium acetate, 131.0 mg of indium acetate and 13.5 mg of antimony acetate into a 50 ml flask, then add 10 ml of 1-octadecene, 2.9 ml of oleic acid, and 0.65 ml of oleylamine, Stir and mix, vacuumize at 105°C for 1h; then, pass nitrogen gas, raise the temperature to 175°C at 4-8°C / min, inject 0.45ml of bromotrimethylsilane into the flask, when the temperature reaches 185°C, quickly ice-bath , cooled to room temperature; finally, the contents of the flask were centrifuged at 10,000 rpm for 10 minutes to remove the supernatant; then washed once with toluene, and then centrifuged at 10,000 rpm for 5 minutes to remove the supernatant, and the precipitate Crush and apply on the surface of the attachment to fully expose to saturated water vapor, keep for 3 minutes; finally, disperse the precipitate in n-hexane, and centrifuge at 5000 rpm for 5 minutes to remove the precipitate, and the average side length is about 38nm Cs 2 InBr 5 (H 2 O): Sb nanocry...

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Abstract

The invention relates to a coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and a preparation method thereof, the chemical formula of the coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal is Cs2InX5 (H2O), the Cs2InX5 (H2O) is doped with an antimony element, and Cs2InX5 (H2O): Sb is formed through a reaction, and X is Cl or Br. According to the novel synthetic method of the coordinated water-containing lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal material, a small amount of antimony element is doped, so that the prepared Cs2InCl5 (H2O): Sb and Cs2InBr5 (H2O): Sb coordinated water-containing antimony-doped lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal material has very strong yellow fluorescence and red fluorescence and excellent stability, and has good photoelectric application prospects.

Description

technical field [0001] The invention relates to a non-lead all-inorganic indium-based zero-dimensional perovskite nanocrystal containing coordination water and a manufacturing method, and belongs to the technical field of perovskite nanocrystal design. Background technique [0002] Perovskite nanocrystals have attracted widespread attention in the fields of photovoltaic and optoelectronic devices because of their excellent photoelectric properties, easy film formation in large areas, and flexibility. However, the further development of traditional lead-based perovskites is restricted due to the toxicity of lead, water decomposition and poor air stability. Non-lead and non-toxic high-performance and high-stability perovskite luminescent materials have attracted great attention of researchers. [0003] Therefore, it is urgent to develop a high-performance, high-stability lead-free perovskite nanocrystal. Among lead-free perovskites, zero-dimensional perovskites have great po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62H01L33/50
CPCC09K11/756H01L33/502
Inventor 陆瑞锋周纬韩沛耿
Owner NANJING UNIV OF SCI & TECH
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