MWT and passivation combined crystal silicon solar cell and manufacturing method thereof
A technology of solar cells and manufacturing methods, applied in the direction of final product manufacturing, sustainable manufacturing/processing, circuits, etc., can solve problems such as low-cost mass-producible structures and preparation methods that have not yet appeared, and achieve the effect of being beneficial to removal
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[0033] Example: The structure of the crystalline silicon solar cell combined with MWT and back passivation in this example is as follows: figure 1 As shown, the structure includes an antireflection film 1, a phosphorus diffusion layer 2, a P-type silicon substrate 3, an aluminum oxide film 4, a laminated protective film 5, and an aluminum printing layer 6 that are stacked in sequence. The hole-filled silver electrode 7 is installed, the hole wall and the hole-filled silver electrode 7 are covered with a dielectric film, the top of the hole-filled silver electrode 7 is covered with a front silver electrode 8, and the aluminum printing layer 6 has spaced protrusions, the protrusions A localized aluminum back field contact 9 is formed through the laminated protective film 5 and the aluminum oxide film 4 and with the P-type silicon substrate 3 .
[0034] Taking 156mm P-type single crystal silicon wafer as the base material, the specific steps of the manufacturing method are as fol...
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