High-performance back surface field paste for crystalline silicon solar cell
A technology of solar cells and crystalline silicon, applied in the direction of conductive materials, circuits, electrical components, etc. dispersed in non-conductive inorganic materials, to achieve the effects of reducing warpage, improving compactness, and improving conductivity
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Embodiment 1
[0019] 1. Preparation of organic carrier
[0020] Take 3% of ethyl cellulose with a viscosity of 10 mPa·s, 2% of ethyl cellulose with a viscosity of 45 mPa·s, 5% of benzyl alcohol, 40% of terpineol, 15% of butyl carbitol, Carbitol acetate 15%, tributyl citrate 13%, dispersant 5%, phenolic resin 2%, total 100%. First add benzyl alcohol, terpineol, butyl carbitol, butyl carbitol acetate and tributyl citrate into the reaction kettle, stir evenly, heat to 60°C, then add dispersant, phenolic resin and ethyl alcohol Ethyl cellulose was stirred for 2-5 hours until the ethyl cellulose was completely dissolved to obtain a transparent and uniform organic carrier.
[0021] 2. Preparation of mixed aluminum powder
[0022] Take 5% of 1-2μm aluminum powder, 10% of 2-3μm aluminum powder, 35% of 4-5μm aluminum powder and 50% of 5-6μm aluminum powder according to the mass percentage, the total amount is 100%, and mix them evenly to obtain the mixed aluminum powder.
[0023] 3. Preparation o...
Embodiment 2
[0033] 1. Preparation of organic carrier
[0034] Take 2% of ethyl cellulose with a viscosity of 10 mPa·s, 3% of ethyl cellulose with a viscosity of 45 mPa·s, 5% of benzyl alcohol, 20% of terpineol, 25% of butyl carbitol, and butyl carbitol according to mass percentage. Carbitol acetate 25%, tributyl citrate 12%, dispersant 5%, epoxy resin 3%, total 100%. First add benzyl alcohol, terpineol, butyl carbitol, butyl carbitol acetate and tributyl citrate into the reaction kettle, stir evenly, heat to 70°C, then add dispersant, epoxy resin and Ethyl cellulose, stirred for 2-5 hours, until the ethyl cellulose is completely dissolved to obtain a transparent and uniform organic carrier.
[0035] 2. Preparation of mixed aluminum powder
[0036] According to mass percentage, take 10% of 1-2μm aluminum powder, 5% of 2-3μm aluminum powder, 30% of 4-5μm aluminum powder, 55% of 5-6μm aluminum powder, the total amount is 100%, and mix them evenly to obtain a mixed aluminum powder.
[0037...
Embodiment 3
[0047] 1. Preparation of organic carrier
[0048] Take 1% ethyl cellulose with a viscosity of 10 mPa s, 4% ethyl cellulose with a viscosity of 45 mPa s, 5% benzyl alcohol, 30% terpineol, 15% butyl carbitol, and Carbitol acetate 25%, tributyl citrate 10%, dispersant 7%, polyester resin 3%, total 100%. First add benzyl alcohol, terpineol, butyl carbitol, butyl carbitol acetate and tributyl citrate into the reaction kettle, stir evenly, heat to 80°C, then add dispersant, polyester resin and Ethyl cellulose, stirred for 2-5 hours, until the ethyl cellulose is completely dissolved to obtain a transparent and uniform organic carrier.
[0049] 2. Preparation of mixed aluminum powder
[0050] Take 15% of 2-3μm aluminum powder, 40% of 4-5μm aluminum powder, and 45% of 5-6μm aluminum powder according to the mass percentage, the total amount is 100%, and mix them evenly to obtain a mixed aluminum powder.
[0051] 3, the preparation of V2O5 powder: with embodiment 2
[0052] 4, alumin...
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