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Kesterite structure cu2fesns4 powder material and its liquid phase preparation method

A technology of kesterite structure and powder, applied in the direction of final product manufacturing, sustainable manufacturing/processing, electrical components, etc., can solve the problems of few reports, and achieve the effect of low cost, short reaction time and low temperature

Active Publication Date: 2015-11-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For the manufacture of Cu 2 FeSnS 4 For solar cells, the first and critical step is to synthesize high-quality Cu 2 FeSnS 4 , however so far, Cu 2 FeSnS 4 There are few reports on the preparation

Method used

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  • Kesterite structure cu2fesns4 powder material and its liquid phase preparation method
  • Kesterite structure cu2fesns4 powder material and its liquid phase preparation method
  • Kesterite structure cu2fesns4 powder material and its liquid phase preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Weigh 4mmolCuCl 2 2H 2 O, 2mmolSnCl 4 ·5H 2 O, 2 mmol FeCl 3 ·6H 2 0, 8mmol thiourea, put into a three-necked round-bottomed flask, add 30ml of triethylenetetramine, pass into nitrogen as protective gas, place the three-necked round-bottomed flask in a constant temperature oil bath and heat it to 230°C, and keep it for 3 hours, Then it was naturally cooled to room temperature, washed three times with anhydrous ethanol and ionized water successively, then filtered, and dried in a drying oven at 60° C. for 6 h to obtain a black solid. The Cu synthesized in this embodiment 2 FeSnS 4 The XRD energy spectrum of the sample is as follows figure 1 shown. It can be seen from the figure that its diffraction peaks are consistent with those of Cu with kesterite structure. 2 FeSnS 4 The standard card (JCPDSNo44-1476) matches very well, the three main peaks correspond to (112), (220), (204) crystal planes, and its secondary diffraction peaks are (200), (312), (400) , (316)...

Embodiment 2

[0030] Weigh 4mmolCuCl 2 2H 2 O, 2mmolSnCl 4 ·5H 2 O, 2 mmol FeCl 3 ·6H 2 0, 8mmol thiourea, put into a three-necked round-bottomed flask, add 15 mL each of mixed solvent ethylene glycol and triethylenetetramine, feed in nitrogen as protective gas, place the three-necked round-bottomed flask in a constant temperature oil bath and heat to 230°C, and kept for 3 hours, then naturally cooled to room temperature, washed with absolute ethanol and deionized water three times in sequence, then filtered, and dried in a drying oven at 60° C. for 3 hours to obtain a black solid. The Cu synthesized in this embodiment 2 FeSnS 4 The XRD energy spectrum and SEM image of the sample are as follows figure 2 , image 3 shown. It can be seen from the SEM image that the obtained sample is in the shape of particles, the size is about 100-300nm, the yield is high, and the distribution is relatively uniform.

Embodiment 3

[0032] Weigh 4mmolCuCl 2 2H 2 O, 2mmolSnCl 4 ·5H 2 O, 2 mmol FeCl 3 ·6H 20, 8mmol thiourea, put into a three-necked round-bottomed flask, add 15 mL each of mixed solvent ethylene glycol and triethylenetetramine, feed in nitrogen as protective gas, place the three-necked round-bottomed flask in a constant temperature oil bath and heat to 200°C, and kept for 3 hours, then naturally cooled to room temperature, washed with absolute ethanol and deionized water three times in sequence, then filtered, and dried in a drying oven at 60°C for 2 hours to obtain a black solid. The Cu synthesized in this embodiment 2 FeSnS 4 The XRD energy spectrum of the sample is as follows Figure 4 shown.

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Abstract

The invention discloses a liquid phase preparation method of stannite structure Cu2FeSnS4 powder for photovoltaic cells. The liquid phase preparation method comprises the steps of weighing CuCl2.2H2O, FeCl3.6H2O, SnCl4.5H2O and thiourea according to a mole ratio of CuCl2.2H2O to FeCl3.6H2O to SnCl4.5H2O to thiourea of 2:(1-1.5):(1-1.5):(4-5), then mixing in a round-bottomed three-necked flask, and then adding an organic mixed solvent or an organic single solvent; introducing nitrogen as protective gas, heating the flask to 200-250 DEG C in a constant-temperature oil bath, preserving heat for 0.5-12 hours, and then naturally cooling to the room temperature; washing the product by using anhydrous ethanol and distilled water in sequence, and then filtering and drying to obtain black powder. The liquid phase preparation method of the stannite structure Cu2FeSnS4 powder material is environmental friendly and pollution-free, short in reaction time, low in required temperature, simple and convenient in operation and low in cost, and is suitable for industrialization of Cu2FeSnS4 powder applied to absorbent layers of photovoltaic cells.

Description

technical field [0001] The invention belongs to the field of preparation methods of raw materials for solar photovoltaic cells, and relates to a kesterite structure Cu 2 FeSnS 4 Powder material and liquid phase preparation method thereof, the kesterite structure Cu 2 FeSnS 4 The powder material is applied to the absorber layer of CFTS thin film solar cells. Background technique [0002] Facing the energy problem and the environmental pollution caused by the burning of fossil fuels, the development of solar cells has become an important way to solve energy and environmental problems. With the widespread use of photovoltaic modules, improving the photoelectric conversion efficiency of cells and reducing costs are the main issues of photovoltaic power generation at present. [0003] Among many solar cells, CuIn 1-x Ga x Se(CIGS) and CdTe thin-film solar cells have attracted widespread attention due to their high efficiency and stable performance, and are in a leading posi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/10H01L31/18
CPCY02P70/521Y02P70/50
Inventor 周继承叶支斌王云云刘涵坚
Owner CENT SOUTH UNIV
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