Method for synthesizing totally inorganic CsPbX3 perovskite nano-crystal

A synthesis method and perovskite technology are applied in the field of synthesis of all-inorganic CsPbX3 perovskite nanocrystals, which can solve the problems of poor reproducibility of nanocrystal synthesis, overcome poor reproducibility, have good application prospects, and reduce professional technical requirements. Effect

Inactive Publication Date: 2017-09-05
XIAMEN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to aim at current CsPbX 3 The reproducibility of nanocrystal synthesis is poor, and it often needs defe

Method used

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  • Method for synthesizing totally inorganic CsPbX3 perovskite nano-crystal
  • Method for synthesizing totally inorganic CsPbX3 perovskite nano-crystal
  • Method for synthesizing totally inorganic CsPbX3 perovskite nano-crystal

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Experimental program
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Embodiment 1

[0022] Such as figure 1 As shown, respectively take 5mL ODE, 0.5mL OA, 0.5mL OAM into a 25mL three-necked flask, and add 16mg Cs at 2500rpm 2 CO 3 , 37mg of lead stearate and 18mg of cyanuric chloride, then directly heated to 140 ° C, and rapidly cooled with ice water, added precipitant ethyl acetate for precipitation, 8000rpm centrifugal washing, discarding the supernatant, obtained as figure 2 CsPbCl shown 3 Nanocrystalline.

Embodiment 2

[0024] Such as figure 1 As shown, respectively take 5mL ODE, 0.5mL OA, 0.5mL OAM into a 25mL three-necked flask, and add 16mg Cs at 2500rpm 2 CO 3 , 37mg lead stearate and 18mg hexachlorocyclotriphosphazene, then directly heated to 120 ° C, and rapidly cooled with ice water, added precipitant ethyl acetate for precipitation, 8000rpm centrifugal washing, discarding the supernatant, obtained as figure 2 CsPbCl shown 3 Nanocrystalline.

Embodiment 3

[0026] Such as figure 1 As shown, respectively take 5mL ODE, 0.5mL OA, 0.5mL OAM into a 25mL three-necked flask, and add 20mg CH at 2500rpm 3 COOCs, 37mg of lead stearate and 18mg of hexachlorocyclotriphosphazene were directly heated to 120°C, cooled rapidly with ice water, added precipitant ethyl acetate for precipitation, centrifuged and washed at 8000rpm, and the supernatant was discarded to obtain Such as figure 2 CsPbCl shown 3 Nanocrystalline.

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Abstract

The invention discloses a method for synthesizing a totally inorganic CsPbX3 perovskite nano-crystal. X refers to Cl, Br or I, and a phase transfer agent does not need to be added. The method comprises the following specific steps: adding a precursor into octadecene dissolved with oleic acid and oleylamine, and heating to the temperature of 110-160 DEG C while stirring; cooling with ice water, and adding ethyl acetate for precipitating; and finally, performing solid-liquid separation to remove the supernatant, thereby obtaining the product, wherein a volume ratio of octadecene to oleic acid to oleylamine is (8-12):(0.8-1.2):(0.8-1.2). According to the synthetic method disclosed by the invention, the CsPbX3 nano-crystal is synthesized in one step through direct heating, nitrogen protection and any polar solvent are not needed, the problem that the previous two methods are poor in reproducibility is solved, and the method has excellent application prospects.

Description

technical field [0001] The invention specifically relates to a method for synthesizing all-inorganic CsPbX3 perovskite nanocrystals. Background technique [0002] CaB 3 (Cl, Br, I) perovskite nanocrystals have the advantages of high fluorescence quantum yield, adjustable spectrum (410-700nm), good defect tolerance, etc., and have been widely used in lasers, sensors, LED displays, Solar cells and other fields. Based on the above advantages and its good application prospects, CsPbX 3 The synthesis of (Cl, Br, I) perovskite nanocrystals has received extensive attention. Currently, synthetic CsPbX 3 There are two main categories of methods: thermal injection methods and solvent-assisted co-precipitation methods. The hot injection method is mainly to dissolve Cs separately under the protection of nitrogen through high-temperature solvents (octadecene, oleic acid, oleylamine). 2 CO 3 and PbX 2 (Cl, Br, I) as a precursor, and then inject one precursor solution into another ...

Claims

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Application Information

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IPC IPC(8): C01G21/00B82Y40/00C09K11/66
CPCC01G21/006C01P2004/04C01P2004/64C09K11/665
Inventor 陈曦李飞明林芳媛王翊如徐威
Owner XIAMEN UNIV
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