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One-step synthetic preparation method of CuInS2 nanowires

A technology of mixture and thiocarbamic acid, which is applied in the direction of nanotechnology, chemical instruments and methods, gallium/indium/thallium compounds, etc., can solve the problems of cumbersome preparation process, high vacuum degree requirements, expensive equipment, etc., and overcome the reaction conditions complex effects

Inactive Publication Date: 2013-03-06
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gas phase method has disadvantages such as expensive equipment, high vacuum requirements, cumbersome preparation process, and poor repeatability.

Method used

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  • One-step synthetic preparation method of CuInS2 nanowires
  • One-step synthetic preparation method of CuInS2 nanowires
  • One-step synthetic preparation method of CuInS2 nanowires

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 0.005mmol silver diethyldithiocarbamate, 0.05mmol copper acetylacetonate, and 0.05mmol dibutyldithiocarbamate indium to a 100mL round-bottomed flask, followed by adding 1.5mmol oleylamine, 15mmol dodeca Mercaptan, 12mmol n-trioctylphosphine oxide, the flask was placed in an oil bath with a constant temperature of 200°C, and the reaction was stirred by magnetic force for 60min. After the reaction was completed, it was cooled to room temperature, the original solution was taken out, diluted with n-hexane, ultrasonically oscillated for 60min, and centrifuged at 10000rpm Separation 10min, CuInS 2 The knot settles at the bottom of the container, and the supernatant is discarded to obtain CuInS 2 Nanowires. The molar concentration ratio of the above-mentioned silver thiocarbamate, copper acetylacetonate, and indium thiocarbamate is 1:10:10, and the molar concentration ratio of indium thiocarbamate and amines is 1:30. The amines, sulfur The molar concentration ratio of a...

Embodiment 2

[0026] Add 0.005mmol silver diisopropyldithiocarbamate, 0.05mmol copper acetylacetonate and 0.05mmol indium diethyldithiocarbamate to a 100mL round-bottomed flask, followed by adding 25mmol dodecylamine, 250mmol decathene Put octamercaptan, 250mmol oleic acid, put the flask in an oil bath with a constant temperature of 260°C, stir the reaction for 60min with magnetic force, cool to room temperature after the reaction, take out the original solution, dilute with n-hexane, oscillate ultrasonically for 10min, and centrifuge at 10000rpm for 10min , CuInS 2 The knot settles at the bottom of the container, and the supernatant is discarded to obtain CuInS 2 Nanowires. The molar concentration ratio of the above-mentioned silver thiocarbamate, copper acetylacetonate, and indium thiocarbamate is 1:100:100, and the molar concentration ratio of indium thiocarbamate and amines is 1:500. The amines, sulfur The molar concentration ratio of alcohol and surface ligand is 1:10:10.

Embodiment 3

[0028] Add the reaction precursor 0.005mmol silver diethyldithiocarbamate, 0.5mmol copper acetylacetonate, 0.5mmol indium diisopropyldithiocarbamate into a 100mL round bottom flask, and then add 15mmol octylamine, 15mmol hexylsulfur Alcohol, 15mmol 3-mercaptopropionic acid, the flask was placed in an oil bath with a constant temperature of 200°C, and the reaction was stirred by magnetic force for 60 minutes. After the reaction was completed, it was cooled to room temperature, and the original solution was taken out, diluted with n-hexane, ultrasonically oscillated for 10 minutes, and centrifuged at 10,000rpm 10min, CuInS 2 The knot settles at the bottom of the container, and the supernatant is discarded to obtain CuInS 2 Nanowires. The molar concentration ratio of the above-mentioned silver thiocarbamate, copper acetylacetonate, and indium thiocarbamate is 1:100:100, and the molar concentration ratio of indium thiocarbamate and amines is 1:30. The amines, sulfur The molar co...

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Abstract

The invention provides a one-step synthetic preparation method of CuInS2 nanowires, which comprises the following steps of: (1) adding a reaction precursor to a reaction vessel and then sequentially adding amine, mercaptan, and a surface ligand to the reaction vessel; (2) placing the reaction vessel in a constant temperature oil bath, reacting under magnetic stirring, and cooling to room temperature at the end of the reaction; and (2) taking an original solution out, diluting with hexane, carrying out ultrasonic oscillation, centrifugally separating at a rotating speed, CuInS2 sinking to the bottom of the vessel, and discarding a supernatant to obtain the CuInS2 nanowires. By utilizing the difference of activity of the precursor, the precursor silver thiocarbamate is firstly decomposed at high temperature to form silver sulfide as a catalyst, copper acetylacetone and indium dithiocarbamate are decomposed at high temperature to form a product dissolved in the silver sulfide catalyst, and CuInS2 is precipitated from silver sulfide particles after saturation is reached to form the CuInS2 semiconductor nanowires. According to the method, the shape and structure of the CuInS2 semiconductor nanowire are controlled at atmospheric pressure, and the yield is up to 90%.

Description

technical field [0001] The invention relates to the technical field of nanomaterial preparation, in particular to a photovoltaic solar cell material CuInS 2 One-step synthetic preparation method of nanowires. Background technique [0002] The unique geometry of one-dimensional nanomaterials (including nanobelts, nanowires, and nanotubes) is an ideal way for the spatial separation and transport of photogenerated carriers. The high specific surface area facilitates the material to receive visible light irradiation, and the ultra-thin size facilitates photogenerated carriers. Migrating from the interior to the surface, the longitudinal dimension can provide higher carrier mobility, and the perfect single crystal characteristics are ideal carrier transport channels. Therefore, in photovoltaic solar cells, CuInS with one-dimensional geometry 2 Nanowires are expected to have higher photogenerated electron-hole separation efficiency. [0003] Therefore, among semiconductor nanom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G15/00B82Y40/00
Inventor 邹超李强黄少铭
Owner WENZHOU UNIVERSITY
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