A kind of preparation method of organic-inorganic hybrid perovskite nanowire

A perovskite and nanowire technology, applied in the field of photoelectric functional material synthesis, can solve the problems of low product purity, low preparation efficiency, complicated steps, etc., and achieve the effects of high product purity, low preparation cost, and simple preparation process.

Active Publication Date: 2021-03-30
NANJING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The cycle of preparing perovskite nanowires by this method is as long as three days, the preparation efficiency is low, the steps are cumbersome, and there are still some perovskite nanosheets in the product, the product purity is not high, and the product purity is about 5% to 10%.

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  • A kind of preparation method of organic-inorganic hybrid perovskite nanowire
  • A kind of preparation method of organic-inorganic hybrid perovskite nanowire

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0021] A method for preparing organic-inorganic hybrid perovskite nanowires, comprising the following steps:

[0022] Step 1: PbI 2 , MAI, PEAI according to PbI 2 :MAI:PEAI = 1:(0.7~1):(0.3~0.5) molar ratio is added dropwise to the benign solvent, and at the reaction temperature of (50~80)℃, keep stirring at the speed of (300~600)rpm (1-3) h, the reaction produces a perovskite precursor solution with a molar concentration of 1 mol / L; wherein, the benign solvent is N,N-dimethylamide;

[0023] Step 2: Add the perovskite precursor solution generated in step 1 dropwise to the stirred poor solvent according to the volume ratio of perovskite precursor solution:poor solvent=(0.2~1):200; wherein, the stirring speed of the poor solvent is ( 500-800) rpm, after the precursor liquid is added dropwise to the poor solvent, the continuous stirring time ...

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Abstract

The invention discloses a method for preparing an organic-inorganic hybrid perovskite nanowire. The method for preparing the organic-inorganic hybrid perovskite nanowire includes the following steps of: (1) adding PbI2 (lead iodide), MAI and PEAI (polyether ester acetamide) dropwise to a benign solvent according to the molar ratio of 1: (0.7-1): (0.3-0.5) and generating perovskite precursor fluidthrough reaction; (2) adding the perovskite precursor fluid produced in step (1) dropwise to a stirred poor solvent with the volume ratio of the perovskite precursor fluid and the poor solvent to be (0.2 to 1): 200 ; (3) centrifuging the liquid formed in step (2) and taking supernatant to obtain the organic-inorganic hybrid perovskite nanowire. The method for preparing the organic-inorganic hybridperovskite nanowire has the advantages of simple and efficient operation, simple preparation process, short preparation cycle, less use of precursor materials, high product purity and low preparationcost.

Description

technical field [0001] The invention relates to the field of synthesis of photoelectric functional materials, in particular to a method for preparing organic-inorganic hybrid perovskite nanowires. Background technique [0002] Organic-inorganic hybrid perovskite is a photoelectric functional material with superior performance, and its structural formula is ABX 3 , where A is a monovalent organic cation, B is a divalent metal cation, and X is a monovalent halogen anion (Cl, Br, I). Organic-inorganic hybrid perovskite has the advantages of high carrier mobility, long diffusion length, strong light absorption ability, high luminous efficiency, adjustable band gap and spectrum, etc., so it is widely used in solar cells, light-emitting diodes, detection devices and lasers. [0003] Many literature reports have shown that changing the crystal morphology of perovskite can improve the photoelectric performance of perovskite. Literature Rui Xiao, Yasen Hou, Yongping Fu, Xingyue Pe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C209/00C07C211/04C09K11/06C09K11/66B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C07C209/00C09K11/06C09K11/664C07C211/04
Inventor 邓玲玲夏鹏飞陈淑芬于洪涛鱼天燕
Owner NANJING UNIV OF POSTS & TELECOMM
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