Aluminum paste for solar energy battery and preparation method thereof
A technology of solar cells and aluminum paste, applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve problems affecting the uniformity of aluminum powder distribution, increasing contact resistance, cracks, etc. , to achieve strong adhesion, low ohmic contact resistance, dense and uniform electrodes
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Embodiment 1
[0022] The invention relates to an aluminum paste for solar cells, the aluminum paste comprises: 65wt% of aluminum powder, 10wt% of copper powder, 10wt% of lead-free glass powder, 15wt% of organic vehicle, the organic vehicle is composed of organic Composed of a solvent and an organic additive, the weight ratio between the two is 4:1, the aluminum powder is spherical, the particle size of the aluminum powder includes two types of 1 μm and 3 μm, and the particle size of the copper powder is 3 μm; Described organic solvent comprises any one or their combination in terpineol, turpentine, butyl carbitol, dibutyl phthalate, plasticizer and tensio-active agent; Described organic additive is cellulose; So Described lead-free glass powder adopts lanthanum, boron, zinc glass system, and its component comprises: the La of 1wt% 2 o 3 , 70wt% B 2 o 3 , 5wt% Al 2 o 3 , 5wt% ZnO, 5wt% Na 2 O, 5 wt% Li 2 O, 8 wt% V 2 o 5 and 1wt% P 2 o 5 . Among the aluminum powders, those with a...
Embodiment 2
[0029]The invention relates to an aluminum paste for solar cells, the aluminum paste comprises: 75wt% of aluminum powder, 5wt% of copper powder, 10wt% of lead-free glass powder, 10wt% of organic vehicle, the organic vehicle is composed of organic Solvent and organic additives, the weight ratio between the two is 6:1, the aluminum powder is spherical, the particle size of the aluminum powder includes two kinds of 2 μm and 6 μm, and the particle size of the copper powder is 4 μm; Described organic solvent comprises any one or their combination in terpineol, turpentine, butyl carbitol, didecyl phthalate, plasticizer and surfactant; Described organic additive is cellulose; The lead-free glass powder adopts lanthanum, boron and zinc glass system, and its components include: 0.5wt% La 2 o 3 , 80wt% B 2 o 3 , 3wt% Al 2 o 3 , 2wt% ZnO, 3wt% Na 2 O, 2wt% Li 2 O, 4 wt% V 2 o 5 and 0.5wt% P 2 o 5 . Among the aluminum powders, those with a particle size of 2 μm accounted for a...
Embodiment 3
[0036] The invention relates to an aluminum paste for solar cells, the aluminum paste comprises: 70wt% aluminum powder, 7wt% copper-aluminum powder, 8wt% lead-free glass powder, 15wt% organic vehicle, the organic vehicle consists of Composed of an organic solvent and an organic additive, the weight ratio between the two is 5:1, the aluminum powder is spherical, the particle size of the aluminum powder includes two kinds of 1.5 μm and 4 μm, and the particle size of the copper powder is 5 μm; described organic solvent comprises any one or their combination in terpineol, turpentine, butyl carbitol, dioctyl phthalates, plasticizer and tensio-active agent; Described organic additive is Cellulose; described lead-free glass powder adopts lanthanum, boron, zinc glass system, and its component comprises: the La of 0.5wt% 2 o 3 , 75wt% B 2 o 3 , 5wt% Al 2 o 3 , 5wt% ZnO, 3wt% Na 2 O, 2wt% Li 2 O, 4 wt% V 2 o 5 and 0.5wt% P 2 o 5 . Among the aluminum powders, those with a par...
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