Environment protection type silicon solar cell back electric field aluminum pulp and producing method thereof
An environment-friendly, aluminum paste technology, applied in the direction of cable/conductor manufacturing, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of high lead content in paste, environmental pollution, etc., to increase p+ concentration and storage time , Improve the effect of conversion efficiency
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[0061] Example 1
[0062] An environmentally friendly aluminum paste for solar battery back field (prepared 100g), and its production process is as follows:
[0063] 1. Glass binder formula (prepared 100g): Bi 2 O 3 45g, B 2 O 3 10g, SiO 2 8g, Al 2 O 3 5g, ZnO 25g, TiO 2 3g, ZrO 2 2g, V 2 O 5 2g.
[0064] 2. Glass melting and ball milling process: 1250℃, 60min, after quenching, ball milling to less than 10μm.
[0065] 3. The weight percentage of spherical powder and flake powder used for conductive aluminum powder is: spherical powder: flake powder=50:50.
[0066] 4. Organic carrier preparation. 10g of turpentine oil and 9g of ethyl cellulose are heated at 80-100°C to fully dissolve and mix.
[0067] 5. Slurry preparation: According to 60g of conductive aluminum powder, 5g of glass binder, 5g of trivalent metal organic compound, add the configured organic carrier and organic additives, stir and disperse in the container, and then carry out three-roll grinding to control the slurry...
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[0077] Example 2
[0078] An environmentally-friendly metal aluminum paste for the back electrode of solar cells (prepared 100g), and its production process is as follows:
[0079] 1. Glass binder formula (prepared 100g): Bi 2 O 3 70g, B 2 O 3 10g, SiO 2 5g, Al 2 O 3 3g, ZnO 2g, TiO 2 2g, ZrO 2 2g, Na 2 O 3g, Li 2 O 3g.
[0080] 2. Glass melting and ball milling process: 1250℃, 60min, after quenching, ball milling to less than 10μm.
[0081] 3. The weight percentage of spherical powder and flake powder used for conductive aluminum powder is: spherical powder: flake powder=70:30.
[0082] 4. Organic carrier preparation. 10g turpentine oil, 7g ethyl cellulose, and heat treatment at 80-100°C to fully dissolve and mix.
[0083] 5. Slurry preparation: According to 70g of conductive aluminum powder, 5g of glass binder, 5g of trivalent metal organic compound, add the configured organic carrier and organic additives, stir and disperse in the container, and then carry out three-roll grindi...
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