A kind of monocrystalline silicon etching texturing additive and its application
A single crystal silicon and texturing liquid technology, which is applied in the directions of single crystal growth, single crystal growth, sustainable manufacturing/processing, etc., can solve the problems of difficulty in further reducing the size, increasing the production of photogenerated carriers, and difficult operation, and achieves Avoid damage to the regularity, improve photoelectric conversion efficiency, and improve the effect of texturing efficiency
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Embodiment 1
[0026] Preparation of the fleece liquid: in terms of mass percentage, it consists of the following components:
[0027] Konjac glucomannan (molecular weight of about 100,000): 1.0%;
[0028] Perfluorooctane sulfonate surfactant: 5 ‰;
[0029] Ascorbic acid: 5 ‰;
[0030] Sodium hydroxide: 7‰;
[0031] Alkyne glycol: 3 ‰;
[0032] Sodium sulfonate: 1.0%;
[0033] Flocculant (PMA): 0.5‰;
[0034] The rest is deionized water.
[0035] The above ingredients are mixed evenly at room temperature to obtain a fleece solution.
[0036] After the cutting monocrystalline silicon wafer is pre-cleaned with water and ethanol, it is immersed in the fleece liquid, the fleeceping temperature is 75 °C, and the fleece time is 5min; the fleece-making monocrystalline silicon wafer is ultrasonically cleaned with deionized water, and the product is placed in a drying box to dry the monocrystalline silicon wafer that obtains the fleece.
Embodiment 2
[0038] Preparation of the fleece liquid: in terms of mass percentage, it consists of the following components:
[0039] Konjac glucomannan (molecular weight of about 100,000): 1.5%;
[0040] Perfluorooctane sulfonate surfactant: 4 ‰;
[0041] Ascorbic acid: 4 ‰;
[0042] Sodium hydroxide: 7‰;
[0043] Alkyne glycol: 5 ‰;
[0044] Sodium sulfonate: 2.0%;
[0045] Flocculant (PMA): 0.3‰;
[0046] The rest is deionized water.
[0047] The above ingredients are mixed evenly at room temperature to obtain a fleece solution.
[0048] After the cutting monocrystalline silicon wafer is pre-cleaned with water and ethanol, it is immersed in the fleecifering liquid, the fleeceping temperature is 75 °C, and the fleece-making time is 10min; the fleece-making monocrystalline silicon wafer is then ultrasonically cleaned with deionized water, and the product is placed in a drying box to dry the monocrystalline silicon wafer that obtains the fleece.
Embodiment 3
[0050] Preparation of the fleece liquid: in terms of mass percentage, it consists of the following components:
[0051] Konjac glucomannan (molecular weight of about 100,000): 1.2%;
[0052] Perfluorooctane sulfonate surfactant: 3.5 ‰;
[0053] Ascorbic acid: 3.5 ‰;
[0054] Sodium hydroxide: 8‰;
[0055] Alkyne glycol: 4 ‰;
[0056] Sodium sulfonate: 1.0%;
[0057] Flocculant (PMA): 0.4‰;
[0058] The rest is deionized water.
[0059] The above ingredients are mixed evenly at room temperature to obtain a fleece solution.
[0060] After the cutting monocrystalline silicon wafer is pre-cleaned with water and ethanol, it is immersed in the fleecifering liquid, the fleeceping temperature is 85 °C, and the fleece time is 5min; the monocrystalline silicon wafer after the fleece is then ultrasonically cleaned with deionized water, and the product is placed in a drying box to dry the monocrystalline silicon wafer that obtains the fleece.
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