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A method for preparing copper-zinc-tin-sulfur thin films based on water-based nano-ink

A nano-ink, copper-zinc-tin-sulfur technology, applied in the direction of climate sustainability, final product manufacturing, sustainable manufacturing/processing, etc., can solve problems such as inability to achieve good dispersion, easy generation of hydrogen sulfide gas, and solvents that are not environmentally friendly. Achieve good photoelectric conversion efficiency, stable and uniform properties, and improve the effect of compactness and uniformity

Active Publication Date: 2022-04-22
JINLING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are several problems in this method. First, the prepared water-based nanoparticles are dispersed and easily aggregated after cleaning. During the cleaning process, the surfactant attached to the surface of the nanoparticles is removed so that a good dispersion effect cannot be achieved.
Therefore, there are a large number of cracks in the film prepared directly by using this nano-ink
In addition, sulfuration annealing is required, and hydrogen sulfide gas is easily generated during the annealing process, polluting the environment
Nanoparticles prepared by oily system have better dispersibility, but most of the solvents used are not environmentally friendly

Method used

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  • A method for preparing copper-zinc-tin-sulfur thin films based on water-based nano-ink
  • A method for preparing copper-zinc-tin-sulfur thin films based on water-based nano-ink
  • A method for preparing copper-zinc-tin-sulfur thin films based on water-based nano-ink

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Effect test

Embodiment 1

[0034]A method for preparing copper-zinc-tin-sulfur film based on water-based nano-ink, comprising the following steps:

[0035] (1) Weigh 0.001mol of zinc acetate, 0.001mol of stannous chloride, 0.0018mol of copper nitrate and 0.009mol of thioacetamide and dissolve them in 50mL of ethylene glycol in sequence. After they are completely dissolved, add 0.64g of PVP to make a precursor body solution.

[0036] (2) The precursor solution was heated by microwave, the microwave power was 400W, and the microwave time was 10min to prepare Cu 2 ZnSnS 4 Nanoparticle ink.

[0037] (3) Apply the nano-ink to the glass substrate and place it in a vacuum annealing furnace. Under a nitrogen atmosphere, the temperature was raised to 400°C at 10°C / min, kept for 60 minutes, and then cooled to room temperature with the furnace.

[0038] To test the obtained products, figure 1 For the prepared Cu 2 ZnSnS 4 The SEM picture of the film shows that compared with the film prepared in the comparat...

Embodiment 2

[0040] A method for preparing copper-zinc-tin-sulfur film based on water-based nano-ink, comprising the following steps:

[0041] (1) Weigh 0.001mol of zinc acetate, 0.0012mol of stannous chloride, 0.00176mol of copper chloride and 0.0396mol of thiourea and dissolve them in 50mL of n-propanol. After they are completely dissolved, add 0.7g of PVP to prepare a precursor solution.

[0042] (2) microwave the precursor solution by microwave method, the microwave power is 600W, and the microwave time is 8min to obtain Cu 2 ZnSnS 4 nano ink.

[0043] (3) Apply the nano-ink to the glass substrate and place it in a vacuum annealing furnace. In an argon atmosphere, heat up to 500°C at 20°C / min, hold for 20 minutes, and then cool to room temperature with the furnace to obtain denser Cu 2 ZnSnS 4 film.

Embodiment 3

[0045] A method for preparing copper-zinc-tin-sulfur film based on water-based nano-ink, comprising the following steps:

[0046] (1) Weigh 0.001mol of zinc chloride, 0.0008mol of stannous chloride, 0.0018mol of cupric chloride and 0.018mol of L-cysteine ​​and dissolve them in 50mL of glycerol, stir evenly to make them completely dissolve in the acetone In the triol, add 0.4g PVP to prepare the precursor solution.

[0047] (2) microwave the precursor solution by microwave method, the microwave power is 50W, and the microwave time is 30min to obtain Cu 2 ZnSnS 4 nano ink.

[0048] (3) Apply the nano-ink to the glass substrate and place it in a vacuum annealing furnace. In a nitrogen atmosphere, heat up to 300°C at 5°C / min, hold for 120 minutes, and then cool to room temperature with the furnace to obtain denser Cu 2 ZnSnS 4 film.

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Abstract

The invention relates to a method for preparing a copper-zinc-tin-sulfur thin film based on water-based nano-ink, which comprises the following steps: (1) cleaning of the substrate; (2) preparation of a precursor solution; (3) Cu 2 ZnSnS 4 Preparation of nano-ink; (4) Preparation of Cu2ZnSnS4 prefabricated film, drying and annealing in an inert atmosphere to prepare Cu2ZnSnS4 with better crystallinity 2 ZnSnS 4 film. The microwave method provided by the present invention prepares aqueous Cu in one step 2 ZnSnS 4 The nano-ink has the advantages of low cost, environmental protection, simple process and good stability, and can solve the problem that the nano-ink is easy to agglomerate after preparing the nano-particles. The present invention prepares the nano-ink into a thin film by a coating method, without annealing in a sulfide atmosphere, and only needs to be annealed in an inert atmosphere to obtain high-quality Cu 2 ZnSnS 4 film.

Description

technical field [0001] The invention relates to the field of photoelectric functional materials, in particular to a method for preparing copper-zinc-tin-sulfur thin films based on water-based nano-inks. Background technique [0002] With the progress of the times and the rapid development of the economy and society, the demand for energy in modern society is getting higher and higher. The traditional fossil energy currently used has caused serious environmental pollution and the fossil energy is increasingly scarce. These factors force people to look for renewable and clean energy. Solar energy is inexhaustible and is the most ideal alternative energy source for human beings. Converting solar energy into electrical energy through photovoltaic power generation technology can better serve human beings. [0003] Solar cells are the core components of photovoltaic power generation. After years of development, the research on solar cells has achieved many fruitful results. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/208H01L31/18H01L31/032
CPCH01L31/0326H01L31/18H01L21/02568H01L21/02628H01L21/02664Y02P70/50
Inventor 王威支国伟郝凌云史翠花张昕曜
Owner JINLING INST OF TECH
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