Kesterite structure Cu2ZnSnS4 powder material and liquid phase preparation method thereof
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A powder material, kesterite technology, applied in the preparation of microspheres, chemical instruments and methods, tin compounds, etc., can solve few problems, and achieve the effects of low cost, short reaction time, and low temperature
Inactive Publication Date: 2013-09-18
CENT SOUTH UNIV
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Problems solved by technology
[0004] For the manufacture of Cu 2 ZnSnS 4 For solar cells, the first and critical step is to synthesize high-quality Cu 2 ZnSnS 4 nanocrystalline, however so far, Cu 2 ZnSnS 4 There are few reports on the preparation of nanocrystals
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Embodiment 1
[0030] Weigh 0.01mmolCuCl 2 2H 2 O, 0.005 mmol ZnCl 2 , 0.005mmolSnCl 4 ·5H 2 O, 0.02mmol sulfur powder, put into a three-necked round-bottomed flask, add 50ml of triethylenetetramine, and leave it for 3-5 minutes to obtain a uniform brick-red solution, feed nitrogen as a protective gas, and place the three-necked round-bottomed flask Heated to 200°C in a constant temperature oil bath and kept for 2 hours, then naturally cooled to room temperature, washed with anhydrous ethanol and ionized water for 3 times, then filtered, and dried at 60°C in a drying oven for 6 hours to obtain black solid.
Embodiment 2
[0032] Weigh 0.015mmolCuCl 2 2H 2 O, 0.008 mmol ZnCl 2 , 0.008mmolSnCl 4 ·5H 2 O, 0.04mmol sulfur powder, put into a three-necked round-bottomed flask, add 60ml of triethylenetetramine, leave it for 3-5 minutes to obtain a uniform brick-red solution, feed nitrogen as protective gas, and place the three-necked round-bottomed flask Heated to 150°C in a constant temperature oil bath and kept for 2 hours, then naturally cooled to room temperature, washed with absolute ethanol and ionized water for 3 times, then filtered, and dried at 60°C in a drying oven for 6 hours to obtain black solid.
Embodiment 3
[0034] Weigh 0.015mmolCuCl 2 2H 2 O, 0.008 mmol ZnCl 2 , 0.008mmolSnCl 4 ·5H 2O, 0.04mmol sulfur powder, put into a three-necked round-bottomed flask, add 60ml of triethylenetetramine, leave it for 3-5 minutes to obtain a uniform brick-red solution, feed nitrogen as protective gas, and place the three-necked round-bottomed flask Heated to 150°C in a constant temperature oil bath and kept for 6 hours, then cooled naturally to room temperature, washed with absolute ethanol and ionized water for 3 times, then filtered, and dried at 60°C in a drying oven for 6 hours to obtain black solid.
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Abstract
The invention discloses a kesterite structure Cu2ZnSnS4 powder material for a solar photovoltaic cell, and a liquid phase preparation method thereof; the liquid phase preparation method comprises the steps that: the material is weighed in the principle of CuCl2.2H2O:ZnCl2:SnCl4.5H2O:sulphur powder=2 (1 to 1. 5): (1 to 1. 5): (4 to 5) (molar ratio) and put into a round-bottom three-neck flask to be mixed, then organic solvent triethylene tetramine solution is added in, the mixture stays still for 3min to 5min, and uniform brick red solution is obtained; after nitrogen is fed in as protective gas, and the brick red solution is put into constant temperature oil bath to be heated to 120DEG C to 240DEG C, maintained for 0.5h to 12h, and then naturally cooled to room temperature; anhydrous ethanol and distilled water are used for sequentially washing a product, then the product is filtered and dried, and black powder is obtained. The liquid phase preparation method of the kesterite structure Cu2ZnSnS4 powder material is green, has no pollution, short reaction time and low required temperature, is convenient to operate, has low cost, and is applicable to the large-scale production of Cu2ZnSnS4 powder (for a photovoltaic cell absorption layer).
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 ZnSnS 4 Powder material and liquid phase preparation method thereof, the kesterite structure Cu 2 ZnSnS 4 The powder is applied to the absorber layer of CZTS 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 x Ga 1-x S(Se) 2 (CIGS) thin film solar cells have received extensive attention due to their high photoelectric conversion efficiency and good stability. However, the hig...
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