Annular positive electrode
A front electrode, ring-shaped technology, applied in circuits, electrical components, semiconductor devices, etc., can solve the problems of narrowing of the sintering window, increase in the proportion of low-power cells, loss, etc., to increase effective conduction, reduce power consumption, and reduce usage. amount of effect
Inactive Publication Date: 2013-03-27
ALTUSVIA ENERGY TAICANG
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Problems solved by technology
[0002] When the solar cell structure does not change, the printing process has a significant impact on the cell efficiency, and the optimization of the front grid line pattern can significantly improve the cell efficiency; in order to further improve the conversion efficiency of crystalline silicon solar cells, various solar cell manufacturers They are all promoting a high diffusion resistance control range in order to obtain higher open circuit voltage and short circuit current, but the low fill factor resistance process will have a certain loss, and narrow the sintering window, and the proportion of low-power cells caused by poor sintering obviously increase
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[0015] Such as figure 1 The front electrode of a solar cell shown includes: a main grid 1 and a thin grid 2; the thin grid 2 is a group of concentric rings centered on the center of the silicon wafer; the main grid 1 is a needle with a wide middle and two pointed ends Leaf shape; the main grid 1 divides the fine grid 2 into four equal parts. The rings in the thin grid 2 are from the inside to the outside, and the width of each ring gradually increases from small to small; the spacing between the rings in the thin grid 2 is dense in the center and sparse at the edges.
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The invention discloses an annular positive electrode which comprises a main grid and thin grids. The thin grids are a group of concentric rings using a silicon wafer center as circle center. The main grid is of a needle shape with two pointed tips and one wide middle. The main grid divides the thin grids in an equalized manner. The positive electrode of solar cells is designed according to distribution characteristics of silicon wafer thin-layer resistance value after diffusion, electric performance is improved, sintering windows are widened, risk of poor sintering is reduced, overall power distribution is higher and more concentrated, use amount of silver paste is further reduced, and cost is reduced.
Description
technical field [0001] The invention relates to a solar cell, in particular to a front electrode of the solar cell. Background technique [0002] In the case of solar cells without changing the cell structure, the printing process has a significant impact on the cell efficiency, and the optimization of the front grid line pattern can significantly improve the cell efficiency; in order to further improve the conversion efficiency of crystalline silicon solar cells, various solar cell manufacturers They are all promoting a high diffusion resistance control range in order to obtain higher open circuit voltage and short circuit current, but the low fill factor resistance process will have a certain loss, and narrow the sintering window, and the proportion of low-power cells caused by poor sintering obviously increase. Contents of the invention [0003] The purpose of the invention is to provide a ring-shaped front electrode capable of improving the conversion efficiency of cr...
Claims
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IPC IPC(8): H01L31/0224
Inventor 安丹丹张满良吴廷斌黄红娜
Owner ALTUSVIA ENERGY TAICANG
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