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Lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and manufacturing method thereof

A technology of nanocrystals and fabrication methods, applied in nanotechnology, nanooptics, nanotechnology, etc.

Pending Publication Date: 2021-07-06
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, no all-inorganic indium-based zero-dimensional perovskite nanocrystals have been reported

Method used

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  • Lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and manufacturing method thereof
  • Lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and manufacturing method thereof
  • Lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0041] First, add 172.0mg of cesium acetate and 131.0mg of indium acetate into a 50ml flask, then add 10ml of 1-octadecene, 2.9ml of oleic acid, and 0.65ml of oleylamine, stir and mix, and vacuumize at 105°C for 1h ; Then, pass nitrogen, heat up to 175°C at a heating rate of 4-8°C / min, inject 0.45ml trimethylchlorosilane, and when the temperature reaches 185°C, quickly ice-bath and cool to room temperature; finally, through a centrifugal device Centrifuge at 10,000r / min for 10 minutes to remove the supernatant for the first time, then wash it once with toluene, and then pass it through the centrifugal device again at 10,000r / min, centrifuge for 5 minutes, remove the supernatant for the second time, and remove the precipitate Disperse in n-hexane, centrifuge at 5000r / min for 5 minutes with a centrifuge, remove the precipitate, and obtain Cs with an average side length of about 15nm 3 InCl 6 nanocrystal colloid. Such as figure 1 As shown, through the powder XRD diffraction te...

Embodiment 2

[0043] First, 129.0mg of cesium acetate, 32.5mg of rubidium acetate and 131.0mg of indium acetate were added to a 50ml flask, then 10ml of 1-octadecene, 2.9ml of oleic acid, and 0.65ml of oleylamine were added, and stirred and mixed. Vacuum at 105°C for 1 hour; then, pass nitrogen gas, heat up to 175°C at a rate of 4-8°C / min, inject 0.45ml of trimethylchlorosilane, and when the temperature reaches 185°C, rapidly ice-bath and cool to room temperature , finally, centrifuge at 10,000r / min for 10 minutes with a centrifuge to remove the supernatant for the first time, then wash with toluene once, and centrifuge with a centrifuge at 10,000r / min for 5 minutes to perform the second supernatant Remove the liquid, and disperse the precipitate into n-hexane, and centrifuge at 5000r / min for 5 minutes by a centrifuge to remove the precipitate, and obtain Rb with an average side length of about 15nm 0.75 Cs 2.25 InCl 6 nanocrystal colloid. Diffraction test by powder XRD, such as figure...

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Abstract

The invention relates to a lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and a manufacturing method thereof, the chemical formula of the lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal is Rb3nCs3-3nInX6, the Rb3nCs3-3nInX6 is doped with antimony, the Rb3nCs3-3nInX6 is reacted to form Rb3nCs3-3nInX6: Sb, X is Cl or Br, and n is more than or equal to 0 and less than or equal to 1. The corresponding nanocrystal is obtained through the steps of raw material adding, variable-temperature treatment, centrifugal treatment and the like. According to the invention, a small amount of antimony element is used for doping, so that the prepared lead-free all-inorganic indium-based perovskite nanocrystal has very strong green fluorescence, the fluorescence quantum yield is up to 45.3%, and the lead-free all-inorganic indium-based perovskite nanocrystal is not only suitable for electroluminescence in a light-emitting diode, but also suitable for a fluorescent layer of a green light-emitting diode, and has a very good photoelectric application prospect.

Description

technical field [0001] The invention relates to a lead-free all-inorganic indium-based zero-dimensional perovskite nanocrystal and a manufacturing method thereof, belonging 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 and instability of lead. Non-lead and non-toxic high-performance perovskite luminescent materials have attracted great attention of scientific researchers. [0003] Therefore, it is urgent to develop a high-performance lead-free perovskite nanocrystal. Among lead-free perovskites, zero-dimensional perovskites have great potential as light-emitting diode materials due to their high quantum yield a...

Claims

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Application Information

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IPC IPC(8): C09K11/62B82Y20/00B82Y40/00
CPCC09K11/628B82Y20/00B82Y40/00
Inventor 陆瑞锋周纬韩沛耿
Owner NANJING UNIV OF SCI & TECH
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