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A method for preparing copper-zinc-tin-sulfur powder for solar thin film

A solar thin film, copper-zinc-tin-sulfur technology, applied in chemical instruments and methods, tin compounds, inorganic chemistry, etc., can solve the problems of difficult to accurately control element composition, complex process, high preparation cost, and achieve convenient and easy preparation and technological process. Simple, low product cost effect

Active Publication Date: 2016-08-17
湖南省华京粉体材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods are complicated in process, and it is difficult to accurately control the composition of each element. In addition, toxic hydrogen sulfide gas is often used in the preparation process, and the preparation cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A: Ingredients

[0027] Copper powder, zinc sulfide, tin oxide, and sulfur are compounded in a molar ratio of 2: 1: 1: 4.6;

[0028] B: Pretreatment

[0029] (1) Make copper powder into a 4g / L suspension, tin oxide into a 20g / L suspension, add 0.5% OP emulsifier in the total amount of the suspension as a dispersant, and control the pH value to be greater than 7.5. The temperature is 25°C, and the two are mixed and stirred for 0.5 hours under the condition of normal pressure;

[0030] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:3, then add sulfur at a molar ratio of 4.1, and stir at room temperature for 10 minutes;

[0031] (3) Mix (1) and (2) with ultrasonic stirring, the ultrasonic power is 25W, the frequency is 15kHZ, stir and mix and age for 1 hour, then carry out vacuum filtration, and put the filtered mixture into an argon-filled Dry in an oven, the temperature is controlled at 65°C, and the drying time is 35 minutes to obta...

Embodiment 2

[0043] A: Ingredients

[0044] Copper powder, zinc sulfide, tin oxide, and sulfur are compounded in a molar ratio of 2: 1: 1: 4.8;

[0045] B: pre-processing

[0046] (1) Make copper powder into 8g / L suspension, tin oxide into 25g / L suspension, add OP emulsifier with 0.8% of the total amount of suspension as dispersant, and control the pH value to be greater than 7.5, The two were mixed and stirred for 1 hour at a temperature of 30°C and normal pressure;

[0047] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:3, then add sulfur in a molar ratio of 4.3, and stir at room temperature for 20 minutes;

[0048] (3) Mix (1) and (2) with ultrasonic stirring, the ultrasonic power is 25W, the frequency is 15kHZ, stir and mix and age for 1.5 hours, then carry out vacuum filtration, and put the filtered mixture into the argon-filled Dry in an oven, the temperature is controlled at 80°C, and the drying time is 50 minutes to obtain a uniformly distribut...

Embodiment 3

[0060] A: Ingredients

[0061] Copper powder, zinc sulfide, tin oxide, and sulfur are mixed in a molar ratio of 2: 1: 1: 5;

[0062] B: Pretreatment

[0063] (1) Make copper powder into a 15g / L suspension, tin oxide into a 30g / L suspension, add 1.2% OP emulsifier as a dispersant in the total amount of the suspension, and control the pH value to be greater than 7.5. The two were mixed and stirred for 1.5 hours at a temperature of 50°C and normal pressure;

[0064] (2) Prepare the precursor solution with urea and absolute ethanol at a ratio of 1:5, then add sulfur in a molar ratio of 4.5, and stir at room temperature for 30 minutes;

[0065] (3) Mix (1) and (2) with ultrasonic stirring, the ultrasonic power is 45W, the frequency is 20kHZ, stir and mix and age for 2 hours, then carry out vacuum filtration, and put the filtered mixture into an argon-filled Dry in an oven, the temperature is controlled at 95°C, and the drying time is 100 minutes to obtain a uniformly distributed...

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PUM

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Abstract

The invention relates to a method for preparing copper-zinc-tin-sulfur powder for a solar film. The copper-zinc-tin-sulfur powder comprises the following raw materials: copper powder, zinc sulfide, tin oxide and sulfur at a mole ratio of 2:1:1:(4.5-5). The method comprises the steps of mixing the raw materials together after pretreatment by a wet method, then carrying out ultrasonic stirring, carrying out suction filtration and drying after intensive and uniform stirring to form mixed powder mixed uniformly, allowing the mixed powder to carry out high-temperature sintering reaction at 230-950 DEG C,cooling a product after the reaction, grinding and ball-milling to obtain the required copper-zinc-tin-sulfur powder material.The method is simple in process flow, low-carbon and environment-friendly, equipment requirements are low, the product cost is low, the preparation is very convenient and easy, furthermore, the product quality is improved, and the method can be used for scale production and solves the problems that S distribution in a CZTS(copper-zinc-tin-sulfur) solar film prepared by the general vulcanization method is nonuniform and has a gradient, that is to say, an S content close to a molybdenum (Mo) layer is low.

Description

technical field [0001] The invention discloses a method for preparing copper-zinc-tin-sulfur powder for solar thin films, which belongs to the technical field of solar photovoltaic cell materials. Background technique [0002] Solar cells, also known as photovoltaics or PV cells, use solar modules to convert sunlight energy into electricity. Previously, solar cells were made using silicon (Si), a more expensive electronic device, as the light-absorbing semiconductor material. In order to make solar cells more economical and cheap, some cheap thin-film and light-absorbing semiconductor materials have been developed, such as copper-indium-gallium-sulfur-diselenide Cu(In,Ga)(S,Se)2, referred to as CIGS . Although the mass production of CIGS in thin-film solar cells has begun, the toxicity and low abundance of indium and selenium are obstacles to the commercial use of CIGS. Interesting alternatives to absorber layers in thin-film solar cells are quaternary chalcogenides, espe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G19/00
CPCC01G19/00
Inventor 李春芳吴尔京李虹云沈季芳戴长欣任改梅
Owner 湖南省华京粉体材料有限公司