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Non-vacuum preparation method of a CZTS or CZTSe thin film not containing carbon layer

A non-vacuum, thin-film technology, applied in the direction of final product manufacturing, sustainable manufacturing/processing, electrical components, etc., can solve the problems of toxicity, environmental hazards, etc., and achieve the effect of simple preparation process, excellent performance, and high photoelectric conversion efficiency

Inactive Publication Date: 2013-10-02
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, this non-vacuum preparation process uses a toxic sulfurization or selenization atmosphere during annealing, causing harm to the environment

Method used

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  • Non-vacuum preparation method of a CZTS or CZTSe thin film not containing carbon layer
  • Non-vacuum preparation method of a CZTS or CZTSe thin film not containing carbon layer
  • Non-vacuum preparation method of a CZTS or CZTSe thin film not containing carbon layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] In this experiment, the CZTS precursor fluid was prepared by the sol-gel method, and then spin-coated into a film. The specific steps are as follows:

[0039] 1. Preparation of CZTS precursor fluid: Dissolve 0.8500g copper nitrate trihydrate, 0.5360g zinc acetate dihydrate, 0.4513g stannous chloride dihydrate and 0.8380g thiourea in 2.5mL dimethyl sulfoxide, and then at room temperature Stir to obtain a light yellow, clear and transparent solution.

[0040] 2. Spin-coating the above-mentioned precursor liquid on the Mo-plated glass with a homogenizer at a rotation speed of 3000 rpm and a spin coating time of 40 s to obtain a CZTS wet film with a thickness of 200 nm.

[0041] 3. Place the wet film in a tubular annealing furnace, thermally decompose it at 280°C for 5 minutes, and anneal it at 530°C for 5 minutes in an argon atmosphere. Repeat the above spin coating, thermal decomposition, and annealing process 9 times, and finally obtain the CZTS film.

Embodiment 2

[0043] In this experiment, the CZTS precursor fluid was prepared by the sol-gel method, and then spin-coated into a film. The specific steps are as follows:

[0044] 1. Preparation of CZTS precursor fluid: Dissolve 0.8600g copper nitrate trihydrate, 0.5360g zinc acetate dihydrate, 0.5360g stannous chloride dihydrate and 1.080g thiourea in 2.5mL dimethyl sulfoxide, and then at room temperature Stir to obtain a light yellow, clear and transparent solution.

[0045] 2. Spin-coating the above-mentioned precursor liquid on the Mo-plated glass with a homogenizer at a speed of 1500rpm and a spin-coating time of 40s to obtain a CZTS wet film with a thickness of 500nm.

[0046] 3. Place the wet film in a tubular annealing furnace, thermally decompose it at 250°C for 5 minutes, and anneal it at 550°C for 5 minutes in a nitrogen atmosphere. The above spin coating, thermal decomposition, and annealing process were repeated 14 times, and finally a CZTS film was obtained.

Embodiment 3

[0048] In this experiment, CZTS nanoparticles are prepared by hydrothermal method, then dispersed in an organic solvent with a binder, and spin-coated to form a film. The specific steps are as follows:

[0049] 1. Preparation of CZTS precursor fluid: Dissolve 0.8700g copper acetate monohydrate, 0.6300g zinc acetate dihydrate, 0.5000g stannous chloride dihydrate and 1.300g thiourea in a mixed solution of 20mL ethylenediamine and water (water and ethyl acetate). The volume ratio of diamine is 4). After stirring at room temperature for 10 hours, it is poured into an autoclave and reacted at 200°C for 24 hours, then cooled to room temperature, the black precipitate is centrifuged, and deionized water is used Washed with absolute ethanol several times to obtain black CZTS nanoparticles. Weigh 0.5 g of ethyl cellulose and dissolve it in 20 mL of ethanol, and then disperse CZTS nanoparticles into a mixture of ethanol and ethyl cellulose to obtain a CZTS precursor fluid.

[0050] 2. Spin-...

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Abstract

The invention relates to a non-vacuum preparation method of a CZTS or CZTSe thin film not containing a carbon layer and belongs to the technical field of thin-film solar cell preparation. The non-vacuum preparation method has the following implementation steps of coating a CZTS or CZTSe precursor liquid uniformly on a substrate to obtain a wet film; performing thermal decomposition on the wet film under the atmosphere of nitrogen or inertia protection, and after obtaining a non-crystal dry film, performing annealing processing on the non-crystal dry film to obtain a multi-crystal thin film having a non-carbon layer; and continuing coating a wet film on the multi-crystal thin film with the non-carbon layer and repeating the above steps and finally obtaining a finished product. The non-vacuum preparation method is an effective way of improving the photoelectric conversion efficiency of CZTS or CZTSe thin-film solar cells. According to the non-vacuum preparation method, the preparation process is simple, the necessary equipment is commonly used equipment, the cost is low, the industrial production is facilitated, the product performance is good, and thus the non-vacuum preparation method has very good market prospects.

Description

Technical field [0001] The invention relates to a non-vacuum preparation method of a CZTS or CZTSe film without a carbon layer, and belongs to the technical field of thin film solar cell preparation. Background technique [0002] As a kind of clean and renewable energy, solar cells have been hugely commercialized worldwide. Thin-film solar cells occupy a certain market in solar cells because of their low cost, high absorption coefficient, light weight and flexibility. 2011 theoretical prediction of Cu 2 ZnSnS 4 (CZTS) and Cu 2 ZnSnSe 4 (CZTSe) quaternary chalcogenide thin-film solar cells have high photoelectric conversion efficiency, and the raw materials used are all cheap and non-toxic elements, so people are highly concerned. The preparation methods of CZTS and CZTSe are divided into vacuum preparation methods and non-vacuum preparation methods. The preparation of CZTS and CZTSe thin films by the vacuum method requires expensive vacuum equipment, which is not conducive to t...

Claims

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Application Information

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IPC IPC(8): H01L31/18
CPCY02P70/50
Inventor 钟向丽张克栋王金斌黄齐鸣
Owner XIANGTAN UNIV
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