Method for forming textured microcrystalline silver on surface of amorphous silicon membrane
An amorphous silicon thin film and texturing technology, applied in the field of solar energy, can solve the problems of low light absorption efficiency, cumbersome and complicated process, and high cost of amorphous silicon thin film
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[0017] The invention provides a method for forming textured microcrystalline silver on the surface of an amorphous silicon film. For the process flow of the preparation method, please refer to figure 1 , specifically include the following steps:
[0018] Step S01. Preparation of precursor solution: dissolving silver acetate and oxalic acid to prepare a precursor solution containing silver acetate and oxalic acid, wherein the mass ratio of silver acetate to oxalic acid is (3.2-13.1): (0.1-0.5) ;
[0019] Step S02. Coating the precursor solution on the surface of the amorphous silicon film: coating the precursor solution in step S01 on the surface of the amorphous silicon film.
[0020] Step S03. Heat treatment in situ induced growth of microcrystalline silver particles: heat-treat the coated amorphous silicon film in step S02 at 200-300° C. to form textured microcrystalline silver on the surface of the amorphous silicon film.
[0021] Specifically, in the precursor solution i...
Embodiment 1
[0030] A method of forming textured microcrystalline silver on the surface of an amorphous silicon film:
[0031] (1) Dissolve 6.5g of silver acetate (analytical pure) and 0.3g of oxalic acid (analytical pure) in 31.4g of isopropanol (analytical pure), and stir at room temperature to obtain a uniform precursor solution;
[0032] (2) Spray the precursor solution in step (1) to an area of 100 cm 2 The surface of the amorphous silicon film, the spraying amount is 0.8-0.9g / cm 2 ;
[0033] (3) Putting the coated amorphous silicon film in step (2) into a constant temperature drying oven, heat-treating at 250°C for 10-12 hours, and then naturally cooling to room temperature;
[0034] (4) The heat-treated amorphous silicon film in step (3) was repeatedly washed twice with deionized water or absolute ethanol, then put into a drying oven, and dried at 60°C for 10 hours to obtain sample a.
Embodiment 2
[0036] A method of forming textured microcrystalline silver on the surface of an amorphous silicon film:
[0037] (1) Dissolve 13.0g silver acetate (analytical pure) and 0.5g oxalic acid (analytical pure) in 47.1g isopropanol (analytical pure), and stir at room temperature to obtain a uniform precursor solution;
[0038] (2) Spray the precursor solution in step (1) to an area of 100 cm 2 The surface of the amorphous silicon film, the spraying amount is 0.8-0.9g / cm 2 ;
[0039] (3) Put the coated amorphous silicon film in step (2) into a constant temperature drying oven, heat-treat at 300°C for 20 hours, and then naturally cool to room temperature;
[0040] (4) The heat-treated amorphous silicon film in step (3) was repeatedly washed with deionized water or absolute ethanol three times, then put into a drying oven, and dried at 80°C for 12 hours to obtain sample b.
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