Polycrystalline silicon wafer texturization additive and application thereof
A polycrystalline silicon wafer, additive technology, applied in sustainable manufacturing/processing, crystal growth, final product manufacturing, etc., can solve the problems of poor texturing stability, poor uniformity, large texture size, etc. Sheet efficiency, reduced reflectivity, good uniformity
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[0021] Example 1:
[0022] The texturing process using the polycrystalline silicon wafer texturing additive of the present invention adopts the following process steps:
[0023] 1) Preparation of texturing additives: using deionized water as a solvent, dissolve 0.1g sodium citrate, 0.1g polyvinyl alcohol, 2g hydrolyzed polymaleic anhydride, and 0.05g fluorocarbon surfactant in deionized water to obtain 100g Velvet additives
[0024] 2) Configure the texturing solution: Dissolve 3kg of HF aqueous solution (the mass percentage of HF in the HF solution is 49%) and 0.05kg of chromium trioxide in deionized water to obtain 10kg of acid solution; then in the acid solution Add 100g of texturing additives made in step 1) to obtain texturing liquid;
[0025] 3) Texturing: Immerse the polycrystalline silicon cell into the texturing solution for surface texturing, the texturing temperature is 10℃, and the texturing time is 1200s.
Example Embodiment
[0026] Example 2:
[0027] The texturing process using the polycrystalline silicon wafer texturing additive of the present invention adopts the following process steps:
[0028] 1) Preparation of texturing additives: using deionized water as a solvent, dissolve 2g sodium citrate, 2g polyvinyl alcohol, 20g hydrolyzed polymaleic anhydride, 0.32g fluorocarbon surfactant in deionized water to obtain 400g texturing additives ;
[0029] 2) Configure the texturing solution: Dissolve 6kg of HF aqueous solution (the mass percentage of HF in the HF solution is 49%) and 0.2kg of chromium trioxide in deionized water to obtain 10kg of acid solution; then in the acid solution Add 400g of texturing additives made in step 1) to obtain texturing liquid;
[0030] 3) Texturing: Immerse the polycrystalline silicon cell in the texturing solution for surface texturing, the texturing temperature is 30℃, and the texturing time is 300s.
Example Embodiment
[0031] Example 3:
[0032] The texturing process using the polycrystalline silicon wafer texturing additive of the present invention adopts the following process steps:
[0033] 1) Preparation of texturing additives: using deionized water as a solvent, dissolve 0.6g sodium citrate, 0.6g polyvinyl alcohol, 7g hydrolyzed polymaleic anhydride, 0.13g fluorocarbon surfactant in deionized water to obtain 200g Velvet additives
[0034] 2) Configure the texturing solution: Dissolve 4.5 kg of HF aqueous solution (the mass percentage of HF in the HF solution is 49%) and 0.125 kg of chromium trioxide in deionized water to obtain 10 kg of acid solution; Add 200g of the texturing additive made in step 1) to the solution to obtain a texturing liquid;
[0035] 3) Texturing: immerse the polycrystalline silicon cell in the texturing solution for surface texturing, the texturing temperature is 20℃, and the texturing time is 750s.
[0036] figure 1 This is the scanning electron micrograph of the textu...
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