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Silver-sodium mixed double perovskite alloy nanocrystal material, preparation and application thereof

A technology of alloy nanomaterials and double perovskite, which is applied in nanotechnology, nanotechnology, nano-optics, etc., to achieve the effects of simple preparation method, improvement of fluorescence performance, and solution of toxicity problems

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

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Problems solved by technology

However, no lead-free all-inorganic AgNa-based double perovskite alloy nanomaterials have been reported so far.

Method used

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  • Silver-sodium mixed double perovskite alloy nanocrystal material, preparation and application thereof
  • Silver-sodium mixed double perovskite alloy nanocrystal material, preparation and application thereof
  • Silver-sodium mixed double perovskite alloy nanocrystal material, preparation and application thereof

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Experimental program
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Embodiment 1

[0025] Add 115.2mg of cesium acetate, 9.2mg of sodium acetate, 56.4mg of silver 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. Vacuumize for 1h; blow nitrogen, heat up to 190°C at 6°C / min, inject 0.4ml trimethylchlorosilane at 175°C, when the temperature reaches 190°C, quickly ice bath, cool to room temperature, 9000±1000 rpm Centrifuge for 10 minutes to remove the supernatant, then wash twice with toluene, centrifuge at 10,000 rpm for 5 minutes to remove the supernatant, then disperse the precipitate in n-hexane, and centrifuge at 6,000 rpm for 5 minutes to remove the precipitate to obtain Cs 2 Na 0.25 Ag 0.75 InCl 6 nanocrystal colloid.

[0026] Tested by powder XRD diffraction, such as figure 1 As shown, the obtained non-lead all-inorganic silver-sodium mixed double perovskite alloy nanocrystalline material has high crystallinity, is a single pure phase, and has an obvious face-cente...

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Abstract

The invention discloses a series of lead-free full-inorganic silver-sodium mixed double perovskite alloy nanocrystal materials, which are prepared by the following steps: adding a cesium-containing compound, sodium acetate, silver acetate and indium acetate into a flask, adding 1-octadecene, oleic acid and oleylamine, stirring and mixing, and vacuumizing at 105 DEG C for 1 hour; introducing nitrogen, heating to 185 DEG C at a speed of 5 DEG C / min, injecting a chlorine-containing compound at 170 DEG C, quickly performing ice bath to room temperature when the temperature is 185 DEG C, centrifuging to remove the supernatant, washing twice with toluene, centrifuging to remove the supernatant, dispersing the precipitate into n-hexane, and centrifuging to remove the precipitate, thereby obtaining the 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, the fluorescence property of the perovskite nanocrystal is improved by regulating the ratio of sodium to silver, 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 photoelectric properties and high fluorescence quantum yield, and have been used in the preparation of light-emitting diodes, lasers and other fields. 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 t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/62B82Y30/00B82Y20/00H01L33/50
CPCB82Y20/00B82Y30/00C09K11/628H01L33/502Y02B20/00
Inventor 韩克利韩沛耿
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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