A kind of preparation method of Cu-based nano black silicon texturing additive
A black silicon texturing and additive technology, applied in chemical instruments and methods, post-processing details, crystal growth, etc., can solve the problem of high cost, reduce texturing costs, reduce material costs, and reduce the size of the textured surface. Effect
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[0045] The invention provides a method for preparing a Cu-based nano black silicon texturing additive. The preparation method is as follows: 1) dissolving a copper compound in an ethanol solution, adding a reducing agent and a dispersant, stirring and dispersing;
[0046] 2) add silane coupling agent to react;
[0047] According to weight percentage, the copper compound, reducing agent, dispersant, and silane coupling agent account for 10-20%, 0.5-10%, 10-50%, 0.1-1%, and the rest is ethanol;
[0048] More preferably, according to weight percentage, the proportion of the copper compound, reducing agent, dispersant and silane coupling agent is 15%, 5%, 20%, 0.5%, and the rest is ethanol;
[0049] 3) filtering, washing, drying, pulverizing, grinding, sieving, and selecting to obtain nano-copper particles;
[0050] 4) mixing the obtained nano-copper particles with ethanol, a reducing agent, and ammonia water to obtain a nano-texturing additive;
[0051]By weight percentage, the...
Embodiment 1
[0068] 1. Add 15% by weight of CuCl 2 Dissolve in an appropriate amount of ethanol, add 5% citric acid by weight, and then add 20% PVP (polyvinylpyrrolidone); stir with a magnetic rod at room temperature for 30 minutes at high speed, and disperse with ultrasonic assistance for 15 minutes;
[0069] 2. Add 0.5% silane coupling agent dissolved in ethanol dropwise, make up ethanol to 100%, stir at 80°C for 4 hours at high speed;
[0070] 3. Filter the above reaction system, wash with absolute ethanol, centrifuge, dry at 100°C for 6 hours, crush, grind, and sieve, and select copper nanoparticles with a diameter of 20-100nm;
[0071] 4. By weight percentage, 15% of the above-mentioned nano-Cu particles, 20% ethanol, 1% citric acid, and 20% ammonia water are made into a mixed solution, supplemented to 100% with deionized water, stirred and mixed evenly, and the present invention can be made Cu-based nano black silicon texturing additive.
[0072] The Cu-based nano black silicon tex...
Embodiment 2
[0075] 1. Add 10% by weight of CuSO 4 Add to the ethanol solution, add 0.5% citric acid by weight, and then add 40% PVP; stir with a magnetic rod at room temperature for 30 minutes at high speed, and disperse with ultrasonic assistance for 15 minutes;
[0076] 2. Add 1.0% ethanol-soluble silane coupling agent dropwise, then make up to 100% with ethanol, and stir at a constant temperature and high speed at 60°C for 4 hours;
[0077] 3. Filter, wash with absolute ethanol, centrifuge, dry at 80°C for 6 hours, crush, grind, and sieve to select copper nanoparticles with a diameter of 30-70nm.
[0078] 4. According to the percentage by weight, mix 13% of the above nano Cu particles, 15% ethanol, 2% citric acid, and 10% ammonia water to form a mixed solution, make up to 100% with deionized water, stir and mix evenly, and then it can be made into nano Texturing additives.
[0079] The Cu-based nano black silicon texturing additive prepared above is used for texturing. The main textu...
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