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Preparation method of perovskite crystal nanowire

A perovskite and nanowire technology, applied in the fields of nanotechnology, nanotechnology, semiconductor/solid-state device manufacturing, etc., can solve the problems of poor size controllability, poor crystal dispersion, and high cost, and achieve significant technological progress and crystallinity. Complete, low-cost effect

Active Publication Date: 2018-02-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the above-mentioned technical problems in the prior art, the present invention provides a method for preparing perovskite crystal nanowires, and the method for preparing such perovskite crystal nanowires should solve the preparation method of the prior art. Technical problems such as poor crystal dispersion, many defects, poor size controllability, and high cost

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  • Preparation method of perovskite crystal nanowire
  • Preparation method of perovskite crystal nanowire
  • Preparation method of perovskite crystal nanowire

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Preparation of perovskite nanowire crystals.

[0032] Dissolve 0.83g of cesium carbonate in 40ml of octadecene and 2.65mL of oleic acid, and heat in an oil bath at 120°C for 1 hour to obtain cesium oleate; add 0.069g of lead bromide into 5mL of octadecene, and dry at 120°C 1h; add 0.83ml oleylamine and 0.53ml oleic acid to aid dissolution, heat the oil bath to 150°C, and stir evenly; after the lead bromide is completely dissolved, add 0.4 ml of the above-mentioned cesium oleate, stir rapidly for 10s, take it out, and immerse it in Rapid cooling in ice water yields CsPbBr 3 perovskite nanoparticles. Then centrifuge at 10000rpm for 15min to remove the supernatant, add toluene, and centrifuge again at 10000rpm for 15min to remove toluene.

[0033] The perovskite nanopowder obtained by centrifugation was dissolved in 20ml of methanol for later use. Put the treated hydrophilic substrate on a heating plate at 120°C, take a drop of the above methanol solution and drop it on...

Embodiment 2

[0036] Preparation of perovskite nanowire crystals.

[0037] Dissolve 0.83g of cesium carbonate in 40ml of octadecene and 2.65mL of oleic acid, and heat in an oil bath at 120°C for 1 hour to obtain cesium oleate; add 0.069g of lead bromide into 5mL of octadecene, and dry at 120°C 1h; add 0.83ml oleylamine and 0.53ml oleic acid to aid dissolution, heat the oil bath to 150°C, and stir evenly; after the lead bromide is completely dissolved, add 0.4 ml of the above-mentioned cesium oleate, stir rapidly for 10s, take it out, and immerse it in Rapid cooling in ice water yields CsPbBr 3 perovskite nanoparticles. Then centrifuge at 10000rpm for 15min to remove the supernatant, add toluene, and centrifuge again at 10000rpm for 15min to remove toluene.

[0038] The perovskite nanopowder obtained by centrifugation was dissolved in 20ml of methanol for later use. Put the treated hydrophilic substrate on a heating plate at 120°C, take a drop of the above methanol solution and drop it on...

Embodiment 3

[0041] Preparation of perovskite nanowire crystals.

[0042] Dissolve 0.83g of cesium carbonate in 40ml of octadecene and 2.65mL of oleic acid, and heat in an oil bath at 120°C for 1 hour to obtain cesium oleate; add 0.069g of lead bromide into 5mL of octadecene, and dry at 120°C 1h; add 0.83ml oleylamine and 0.53ml oleic acid to aid dissolution, heat the oil bath to 150°C, and stir evenly; after the lead bromide is completely dissolved, add 0.4 ml of the above-mentioned cesium oleate, stir rapidly for 10s, take it out, and immerse it in Rapid cooling in ice water yields CsPbBr 3 perovskite nanoparticles. Then centrifuge at 10000rpm for 15min to remove the supernatant, add toluene, and centrifuge again at 10000rpm for 15min to remove toluene.

[0043] The perovskite nanopowder obtained by centrifugation was dissolved in 20ml of methanol for later use. Place the treated hydrophilic substrate on a heating plate at 130°C, take a drop of the above methanol solution and drop it ...

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Abstract

The invention discloses a preparation method of a perovskite crystal nanowire. Firstly perovskite nano-particles are synthesized and dissolved in an organic solvent and evenly stirred, the solution isdropped on a substrate of 80-150 DEG C so that the solvent is enabled to be rapidly evaporated and the perovskite nano-particles are enabled to be evenly adhered on the substrate, then the substrateis arranged in an enclosed culture dish so that the perovskite nano-particles are enabled to be exposed in the saturated vapor pressure environment of good solvent for culturing 1-15 days under the temperature of 10-50 DEG C, and the perovskite crystals grow along the one-dimensional direction so as to obtain the nanowire material. The method comprises the process of rapid precipitation of the nanocrystals in solvent evaporation under high temperature and the process of self-assembling of the nanocrystals occurred in the culture dish under the saturated vapor pressure. The size of the perovskite nanowires changes along with the change of the culture time, the hydrophilic-hydrophobic property of the substrate material and the culture temperature.

Description

technical field [0001] The invention belongs to the field of optoelectronic information materials, and relates to a perovskite crystal, specifically a method for preparing a perovskite crystal nanowire. Background technique [0002] Perovskite refers to the CaTiO 3 Compounds with similar crystal structures are collectively referred to as perovskites. In recent years, following the development of sensitized dye solar cells, inorganic / organic perovskites have become one of the research hotspots due to their gradually increasing solar energy conversion efficiency. This perovskite has the general formula ABX 3 said, where A, B and X represent central cations, metal cations and halogen anions respectively, and now the central cations are mostly FA((CH(NH) 2 ) 2+ ), MA (CH 3 NH 3+ ) and Cs + etc., the metal cation is Pb 2+ with Sn 2+ , the halide anion is chlorine (Cl - ), bromine (Br - ) and iodine (I - ). The conversion efficiency of perovskite solar cells based on...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L51/42H01L51/48B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00H10K71/12H10K30/10Y02E10/549
Inventor 徐公杰蔡斌颜骥宇田甜吕旭东
Owner UNIV OF SHANGHAI FOR SCI & TECH
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