Composite system glass powder for secondary gate electrode silver paste of crystalline silicon solar cell
A solar cell and glass powder technology, which is applied in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc., can solve the problems of inability to erode anti-reflection films, etc., to increase the effective contact area and improve Effect of open circuit voltage, good wetting properties
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Embodiment 1
[0028] The invention discloses a composite system glass powder for the silver paste of the sub-gate electrode of crystalline silicon solar cells, which is applied to monocrystalline silicon SE-PERC cells.
[0029]First, glass powders of tellurite T1, borate B1 and silicate S1 were prepared respectively, and the specific steps were as follows.
[0030] (1) Batching and mixing: Weigh the raw materials of tellurite T1, borate B1 and silicate S1 according to the oxides and ratios listed in Table 1-3, and then use a mixer to fully mix them for 40 minutes .
[0031] (2) Melting glass: Put the raw materials of tellurite T1, borate B1 and silicate S1 into a corundum crucible and place them in a high-temperature resistance furnace for melting. The melting temperature of tellurite T1 is 950 o C, the time is 30 minutes; the melting temperature of borate B1 is 1050 o C. The time is 40 minutes; the melting temperature of silicate S1 is 1200 o C, the time is 50 minutes.
[0032] (3) Wa...
Embodiment 2
[0052] The invention discloses a composite system glass powder for the silver paste of the sub-gate electrode of crystalline silicon solar cells, which is applied to high square resistance monocrystalline silicon PERC cells.
[0053] First, glass powders of tellurite T2, borate B2 and silicate S2 were prepared respectively, and the specific steps were as follows.
[0054] (1) Batching and mixing: Weigh the raw materials of tellurite T2, borate B2 and silicate S2 according to the oxides and ratios listed in Table 6-8, and then use a mixer to fully mix them for 40 minutes .
[0055] (2) Melting glass: Put the raw materials of tellurite T2, borate B2 and silicate S2 into a corundum crucible and place them in a high-temperature resistance furnace for melting. The melting temperature of tellurite T2 is 900 o C, the time is 30 minutes; the melting temperature of borate B2 is 1000 o C, the time is 40 minutes; the melting temperature of silicate S2 is 1150 o C, the time is 50 minu...
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