Positive silver slurry for crystalline silicon solar cell and preparation method thereof
A technology for solar cells and crystalline silicon, which is applied in the field of front-side silver paste for crystalline silicon solar cells and its preparation, can solve problems such as the influence of aspect ratio, and achieve improved gate line aspect ratio, reduced widening phenomenon, and increased aspect ratio than the effect
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Embodiment 1
[0026] The composition and weight percentage of the front silver conductive paste in this example are: 70% silver powder, 8% glass powder, 5% organic vehicle, 1% polydimethylsiloxane, 0.2% BYK110, and the rest is solvent. Among them, the particle size of the silver powder is 0.5-3 microns, and the tap density is 4.5-6g / m 3 The spherical silver powder; the glass powder is PbO-TeO 2 A series of glass powders with a particle size of 0.5-3 microns.
[0027] Preparation of organic vehicle: rosin 2%, ethyl cellulose 1%, epoxy resin 5%, butyl carbitol 50%, butyl carbitol acetate 40%, dissolved at 80°C for 2 hours to obtain a uniform organic carrier;
[0028] Weigh 70% of silver powder, 8% of glass powder, 5% of organic carrier, 1% of polydimethylsiloxane, 0.2% of BYK1100.2% according to the proportion of the above formula, and mix them evenly in a planetary mixer or other mixer. Then disperse it on a three-roll machine to a thickness below 10 μm to make a front silver paste for cr...
Embodiment 2
[0031] The composition and weight percentage of the front silver conductive paste in this example are: 85% silver powder, 5% glass powder, 8% organic vehicle, 1.2% polyaminosiloxane, and 0.2% BYK110. Among them, the particle size of the silver powder is 0.5-3 microns, and the tap density is 4.5-6g / m 3 The spherical silver powder; the glass powder is PbO-TeO 2 A series of glass powders with a particle size of 0.5-3 microns.
[0032] Preparation of organic vehicle: 3% ethyl cellulose, 2% epoxy resin, 3% cellulose acetate, 50% terpineol, and 40% DBE were dissolved at 80°C for 2 hours to obtain a uniform organic vehicle;
[0033] Weigh 85% of silver powder, 5% of glass powder, 8% of organic carrier, 1% of polyaminosiloxane, 0.5% of BYK110 according to the proportion of the formula, and mix them evenly in a planetary mixer or other mixer, and then mix them in a three-roller On-machine dispersion to less than 10μm can be used to make front silver paste for crystalline silicon sola...
Embodiment 3
[0036] The composition and weight percentage of the front silver conductive paste in this example are: 82% silver powder, 2.5% glass powder, 10% organic vehicle, 2% polyhydroxysiloxane, and 0.3% BYK110. Among them, the particle size of the silver powder is 0.5-3 microns, and the tap density is 4.5-6g / m 3 The spherical silver powder; the glass powder is PbO-TeO 2 A series of glass powders with a particle size of 0.5-3 microns.
[0037] Preparation of organic vehicle: 3% of acrylic resin, 5% of polyethylene resin, 3% of polyethylene resin, 50% of propylene glycol butyl ether, and 40% of terpineol were dissolved at 80°C for 2 hours to obtain a uniform organic vehicle;
[0038] Weigh 82% of silver powder, 2.5% of glass powder, 10% of organic vehicle, 2% of polyhydroxysiloxane, 0.3% of BYK110 according to the proportion of the formula, and mix them evenly in a planetary mixer or other mixer, and then mix them in a three-roller On-machine dispersion to less than 10μm can be used t...
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Abstract
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