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Sodium-indium-based double-perovskite nanocrystal material, preparation and application thereof

A double perovskite, nanocrystal technology, applied in nanotechnology, nanotechnology, luminescent materials, etc., to achieve the effect of solving toxicity problems, excellent stability, and strong yellow fluorescence

Inactive Publication Date: 2021-03-12
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no lead-free all-inorganic sodium-based double perovskite materials have been reported so far.

Method used

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  • Sodium-indium-based double-perovskite nanocrystal material, preparation and application thereof
  • Sodium-indium-based double-perovskite nanocrystal material, preparation and application thereof
  • Sodium-indium-based double-perovskite nanocrystal material, preparation and application thereof

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Embodiment 1

[0029] Add 115.2mg of cesium acetate, 36.9mg of sodium acetate and 146.0mg 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 1 hour; Nitrogen, 6°C / min to heat up to 180°C, inject 0.4ml trimethylchlorosilane at 165°C, when the temperature reaches 180°C, quickly ice bath, cool to room temperature, and centrifuge at 9000±1000 rpm for 10 minutes to remove the upper Then wash it twice with toluene, centrifuge at 10000 rpm for 5 minutes to remove the supernatant, then 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 12.5nm. Cs 2 NaInCl 6 nanocrystal colloid.

[0030] Tested by powder XRD diffraction, such as figure 1 As shown, the obtained undoped non-lead all-inorganic sodium indium-based double perovskite nanocrystal material has high crystallinity, is a single pure phase, and has ...

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Abstract

The invention discloses a novel undoped and silver-doped non-lead full-inorganic sodium-indium-based double perovskite nanocrystal material, which is prepared from the following steps: adding a cesium-containing compound, sodium acetate, indium acetate and silver acetate into a flask, adding 1-octadecene, oleic acid and oleylamine, stirring and mixing, and vacuumizing at 100-110 DEG C for 1 hour;introducing nitrogen, heating to 180-185 DEG C at the speed of 4-8 DEG C / min, injecting a chlorine-containing compound at the temperature of 165-170 DEG C, quickly performing ice bath to room temperature when the temperature is 180 DEG C, centrifuging to remove supernatant, washing twice with methylbenzene, centrifuging to remove supernatant, dispersing precipitates into n-hexane, and centrifugingto remove the precipitates to obtain nanocrystal colloid. According to the invention, the preparation method is simple, the toxicity problem of the lead-based perovskite is solved, the stability of the perovskite nanocrystal is improved through silver doping, the fluorescence property of the perovskite nanocrystal is improved, and the perovskite nanocrystal material has a good application prospect in the photoelectric field.

Description

technical field [0001] The invention belongs to the technical field of light-emitting diodes, and in particular relates to the synthesis and application of a novel light-emitting diode nano-luminescent material. Background technique [0002] Lead-based perovskite nanocrystal materials have good optoelectronic properties and have been used to prepare devices such as light-emitting diodes, solar cells, and photodetectors. However, its toxicity and instability seriously restrict its large-scale application. Therefore, high-efficiency lead-free perovskite nanoluminescent materials have attracted extensive attention from researchers all over the world. [0003] Therefore, for the sake of environmental friendliness and sustainable development, it is an inevitable trend in the development of perovskite materials to replace lead with non-toxic or low-toxic non-lead elements. Among lead-free perovskites, double perovskites have potential applications due to their three-dimensional ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62G01J1/42H01L31/032H01L33/50B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C09K11/628G01J1/429H01L31/032H01L33/502Y02B20/00
Inventor 韩克利韩沛耿
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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