Front aluminum paste suitable for N-type TOPCon battery and preparation method of front aluminum paste
A battery and aluminum paste technology, applied in the field of solar cells, can solve the problems of no Voc gain, less formation of P+ layer, high cost, etc., and achieve the effects of excellent corrosion, enhanced corrosion, and improved open circuit voltage.
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Embodiment 1
[0024] A front aluminum paste suitable for N-type TOPCon batteries is prepared from the following components according to mass percentage:
[0025] Aluminum powder 70%: spherical, particle size 1μm, D100<10μm, oxygen content 0.4%;
[0026] Group III nanometer metal powder and its alloy powder 5.5%: the specific table is 14m 2 / g. Contains: 2% aluminum-silicon alloy powder, 3% aluminum-boron alloy powder;
[0027] Main glass powder 1%: average particle size 0.5μm, softening point 320°C, composition is lead oxide 90%, silicon oxide 1%, boron oxide 4%, zinc oxide 4%, gallium oxide 1%;
[0028] Secondary glass powder 0.5%: average particle size 0.5μm, softening point 420°C, components are barium oxide 40%, strontium oxide 10%, antimony trioxide 6%, silicon oxide 4%, boron oxide 20%, zinc oxide 10% %, gallium oxide 10%;
[0029] The above is the solid content, and the solid content is 77%.
[0030] Organic carrier 21%: the main components are resin and solvent, which are mixed...
Embodiment 2
[0037] A front aluminum paste suitable for N-type TOPCon batteries is prepared from the following components according to mass percentage:
[0038] Aluminum powder 73%: spherical, particle size 3μm, D100<10μm, oxygen content 0.2%;
[0039] Group III nanometer metal powder and its alloy powder 3%: ratio table 20m 2 / g. Contains: 2% boron powder, 1% indium powder, etc.;
[0040] Main glass powder 4%: average particle size 2μm; softening point 430°C, composition is lead oxide 50%, bismuth oxide 30%, silicon oxide 10%, boron oxide 6%, aluminum oxide 1%, titanium oxide 3%;
[0041] Secondary glass powder 2%: average particle size 2μm; softening point 580°C, composition is barium oxide 10%, calcium oxide 20%, silicon oxide 10%, boron oxide 30%, aluminum oxide 4%, zinc oxide 20%, oxide Titanium 6%;
[0042] The above is the solid content, and the solid content is 82%.
[0043] Organic carrier 10%: the main components are resin and solvent, mix, heat and stir the two, and boil at...
Embodiment 3
[0053] A front aluminum paste suitable for N-type TOPCon batteries is prepared from the following components according to mass percentage:
[0054] Aluminum powder 75%: spherical, particle size 2μm, D100<10μm, oxygen content 0.3%;
[0055] Group III nanometer metal powder and its alloy powder 1%: ratio table 20m 2 / g. Contains: 1% indium powder, etc.;
[0056] Main glass powder 3%: average particle size 1μm; softening point 380°C, composition is lead oxide 60%, bismuth oxide 10%, silicon oxide 5%, boron oxide 15%, zinc oxide 5%, titanium oxide 5%;
[0057]Secondary glass powder 1%: average particle size 1μm; softening point 500°C, components are 20% barium oxide, 30% strontium oxide, 9% antimony trioxide, 1% silicon oxide, 10% boron oxide, 30% zinc oxide ;
[0058] The above is the solid content, and the solid content is 80%.
[0059] Organic carrier 15%: the main components are resin and solvent, mix, heat and stir the two, and boil at 70°C;
[0060] The resin accounts ...
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