Aluminium paste special for local aluminium back surface field crystalline silicon solar cells and preparation method of aluminium paste
A solar cell and aluminum back field technology, which is applied in cable/conductor manufacturing, circuit, photovoltaic power generation, etc., can solve the problem of passivation film damage on the surface of the battery, strong corrosion, and poor filling of passivation film perforation or opening. Groove and other problems, to improve the contact situation, the effect of good fluidity
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Embodiment 1
[0020] 1) Preparation of inorganic binder: take SiO in parts by mass 2 15 copies, B 2 o 3 20 copies, Al 2 o 3 6 copies, Bi 2 o 3 35 parts, ZnO 20 parts, TiO 2 3 parts and ZrO 2 1 part, after mixing the above raw materials evenly, put it into a porcelain crucible, dry it in a digital blast drying oven at 135±10°C for 2 hours, put it in a high-temperature furnace, melt it at 900°C for 70 minutes, quench it with water and bake it dry, then ball milled to below 8 μm, and dried to obtain an inorganic binder;
[0021] 2) Preparation of organic adhesive: 7.5 parts by mass of ethyl cellulose, 2.5 parts of phenolic resin, 12 parts of diethylene glycol monobutyl ether, 39 parts of terpineol, 3 parts of alcohol ester twelve, butyl carboxylate 36 parts of benzyl alcohol acetate, the above-mentioned raw materials were dissolved at 100°C in the reactor to obtain a uniform and transparent organic adhesive;
[0022] 3) Aluminum powder: almost spherical aluminum powder, the puri...
Embodiment 2
[0026] 1) Preparation of inorganic binder: take SiO in parts by mass 2 15 copies, B 2 o 3 5 copies, Al 2 o 3 1 part, PbO 65 parts, ZnO 10 parts, TiO 2 2 parts and ZrO 2 2 parts, after mixing the above raw materials evenly, put them into a porcelain crucible, dry them in a digital blast drying oven at 135±10°C for 2 hours, put them in a high-temperature furnace, melt them at 1000°C for 50 minutes, quench them with water and bake them dry, then ball milled to below 8 μm, and dried to obtain an inorganic binder;
[0027] 2) Preparation of organic adhesive: take 10 parts by mass of ethyl cellulose, 1 part of phenolic resin, 14 parts of diethylene glycol monobutyl ether, 40 parts of terpineol, 10 parts of alcohol ester twelve, butyl carboxylate 25 parts of benzyl alcohol acetate, the above-mentioned raw materials are dissolved in the reaction kettle at 100°C to obtain a uniform and transparent organic adhesive;
[0028] 3) Aluminum powder: almost spherical aluminum pow...
Embodiment 3
[0032] 1) Preparation of inorganic binder: take SiO in parts by mass 2 5 copies, B 2 o 3 15 copies, Al 2 o 3 6 copies, Bi 2 o 3 50 parts, ZnO 20 parts, TiO 2 1 part and ZrO 2 3 parts, after mixing the above raw materials evenly, put them into a porcelain crucible, dry them in a digital blast drying oven at 135±10°C for 1.5h, put them in a high-temperature furnace, melt them at 1100°C for 80 minutes, and quench them with water Drying, then ball milling to below 8 μm, and drying to obtain an inorganic binder;
[0033] 2) Preparation of organic adhesive: 7 parts by mass of ethyl cellulose, 1.5 parts of phenolic resin, 13 parts of diethylene glycol monobutyl ether, 45 parts of terpineol, 8.5 parts of alcohol ester twelve, butyl carboxylate 25 parts of benzyl alcohol acetate, the above-mentioned raw materials are dissolved in the reaction kettle at 100°C to obtain a uniform and transparent organic adhesive;
[0034] 3) Aluminum powder: almost spherical aluminum powd...
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