Solar cell with three gate electrode structures

Abstract

The invention relates to a solar cell with three gate electrode structures. A front face gate line structure comprises three symmetrical primary gate lines and a plurality of evenly distributed secondary gate lines perpendicular to the primary gate lines, one primary gate line is located on the center line of a silicon wafer, and the two ends of each primary gate line and the part, connected with the corresponding primary gate line, of each secondary gate line are respectively of a gradual change type structure. A back face structure comprises three primary gate lines corresponding to the front face gate lines, and asymmetric direction signs smaller than the width of the gate lines exist in the grate line direction. According to the gradual change type structures of the two ends of the primary gate lines, the two ends of each primary gate line gradually narrow down and are of a trapezoid gradual change stricture. According to the gradual change stricture of each secondary gate line, in the junction of the secondary gate line and the corresponding primary gate line, the width of the position, close to the corresponding primary gate line, of the secondary gate line is large, the secondary gate line gradually narrows down when far away from the corresponding primary gate line, and when the secondary gate line reaches a certain length, the width of the secondary gate line is the smallest and will no longer change. The solar cell with the three gate electrode structures can lower cell cost, improve the efficiency of solving problems, and improve the efficiency of a battery piece to a certain extent.

Description

1. Technical field [0001] The invention relates to a solar cell with a triple grid electrode structure, belonging to the field of solar cell manufacturing. 2. Background technology [0002] At present, the development of new energy sources is imminent in the world, and people's demand for renewable energy is increasing, especially the utilization of solar energy. With the maturity of solar cell technology, solar cells have become the most concerned part in daily life and production, and crystalline silicon solar cells can effectively collect and utilize solar energy, and have already occupied a considerable proportion in the market. For the production of solar cells, the design of the battery grid is very important, which directly determines the ability of the cells to collect and utilize solar energy and the cost of the cells. For the battery grid structure, each manufacturer also has different production experience and technology. The mature production method in the marke...

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Problems solved by technology

For the battery grid structure, each manufacturer also has different production experience and technology. The mature production method in the market at this stage is to use two busbars or three grids without gradient grid design on the front. In terms of electrical performance, it is not as good as the three-grid battery, and the non-gradient three-grid battery consumes a lot of slurry

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