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Preparation method of surfactant-modified CuInS2 nanocrystal

A surfactant and nanocrystal technology, applied in nanotechnology, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of difficult control of CuInS2, and achieve high relative solid yield, good light absorption performance, and better light absorption performance. Effect

Inactive Publication Date: 2014-08-06
JIANGSU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, CuInS with high purity and good crystal form is prepared by solvothermal method. 2 still difficult to control

Method used

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  • Preparation method of surfactant-modified CuInS2 nanocrystal
  • Preparation method of surfactant-modified CuInS2 nanocrystal
  • Preparation method of surfactant-modified CuInS2 nanocrystal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Weigh 0.4651g CuCl with an analytical balance 2 2H 2 O, 0.8000g InCl 3 4H 2 O, 0.5192g CH 4 N 2 S, placed in 40ml N, N-dimethylformamide in turn, stirred to fully dissolve it, and a yellow clear solution was obtained. where n(CuCl 2 2H 2 O):n(InCl 3 4H 2 O):n(CH 4 N 2 S)=1︰1︰2.5.

[0030] 2) Measure 40ml of ethylene glycol and slowly pour it into the solution in step 1), stir to disperse it evenly, and obtain a colorless and clear solution.

[0031] 3) Add 0.01% KH550 of the total mass of the mixed solution to the step 2).

[0032] 4) The solution in step 3) was transferred into a polytetrafluoroethylene-lined autoclave with a volume of 100 mL and then sealed. After reacting at 190° C. for 12 hours, it was naturally cooled to room temperature.

[0033] 5) Centrifuge the reaction feed liquid in step 4) in an electric centrifuge for 15 minutes at a speed of 3000 r / min, then pour out the upper clear layer, and wash it several times with absolute ethanol and...

Embodiment 2

[0035] 1) Weigh 0.4651g CuCl with an analytical balance 2 2H 2 O, 0.8000g InCl 3 4H 2 O, 0.5192g CH 4 N 2 S, placed in 40ml N, N-dimethylformamide in turn, stirred to fully dissolve it, and a yellow clear solution was obtained. where n(CuCl 2 2H 2 O):n(InCl 3 4H 2 O):n(CH 4 N 2 S)=1︰1︰2.5.

[0036] 2) Measure 40ml of ethylene glycol and slowly pour it into the solution in step 1), stir to disperse it evenly, and obtain a colorless and clear solution.

[0037] 3) Add 0.1% KH550 of the total mass of the mixed solution to the step 2).

[0038] 4) The solution in step 3) was transferred into a polytetrafluoroethylene-lined autoclave with a volume of 100 mL and then sealed. After reacting at 190° C. for 12 hours, it was naturally cooled to room temperature.

[0039]5) Centrifuge the reaction feed liquid in step 4) in an electric centrifuge for 15 minutes at a speed of 3000 r / min, then pour out the upper clear layer, and wash it several times with absolute ethanol and d...

Embodiment 3

[0041] 1) Weigh 0.4651g CuCl with an analytical balance 2 2H 2 O, 0.8000g InCl 3 4H 2 O, 0.5192g CH 4 N 2 S, placed in 40ml N, N-dimethylformamide in turn, stirred to fully dissolve it, and a yellow clear solution was obtained. where n(CuCl 2 2H 2 O):n(InCl 3 4H 2 O):n(CH 4 N 2 S)=1︰1︰2.5.

[0042] 2) Measure 40ml of ethylene glycol and slowly pour it into the solution in step 1), stir to disperse it evenly, and obtain a colorless and clear solution.

[0043] 3) Add 1% KH550 of the total mass of the mixed solution to the step 2).

[0044] 4) The solution in step 3) was transferred into a polytetrafluoroethylene-lined autoclave with a volume of 100 mL and then sealed. After reacting at 190° C. for 12 hours, it was naturally cooled to room temperature.

[0045] 5) Centrifuge the reaction feed liquid in step 4) in an electric centrifuge for 15 minutes at a speed of 3000 r / min, then pour out the upper clear layer, and wash it several times with absolute ethanol and de...

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Abstract

The invention discloses a preparation method of a surfactant-modified CuInS2 nanocrystal, which comprises the following steps: sequentially adding CuCl2.2H2O, InCl3.4H2O and CH4N2S into an organic solvent, sufficiently dissolving by stirring, adding a surfactant, and evenly mixing, wherein the surfactant is a KH550 silane coupling agent, KH570 silane coupling agent or polyvinyl butyral; transferring the mixture into a pressure kettle, sealing, carrying out thermostatic reaction for 12 hours, and after the reaction finishes, naturally cooling to room temperature; and centrifuging the reaction product, washing and drying. The binary mixed solvent is used instead of the traditional single organic solvent, and the surfactant is added into the mixed reaction system, thereby improving the aggregation phenomenon of the product, and obtaining the nano photovoltaic material which has the advantages of uniform nanosheet structure, high solid yield, favorable light absorption property and proper energy gap.

Description

technical field [0001] The invention belongs to the field of photovoltaic materials, and relates to a method for synthesizing a class of ternary compound semiconductor nanopowder, in particular to a uniform flaky CuInS 2 Preparation methods of nanocrystals. Background technique [0002] Solar energy is a typical green energy. It is the best choice to solve the two major problems of energy and environment in the 21st century. One of the important ways to use solar energy is to develop solar cells. Silicon-based materials and compound semiconductor materials play an important role in solar cell materials. High cost is currently the main obstacle restricting the development of these two types of solar cells. To solve the cost problem of solar cells, it is necessary to reduce the cost of material production, and at the same time improve the photoelectric conversion efficiency, including seeking some special materials and preparation processes. [0003] Among compound semicondu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G15/00B82Y40/00
Inventor 高延敏赵琴冯清
Owner JIANGSU UNIV OF SCI & TECH
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