Solar cell

Abstract

A solar cell, including a semiconductor substrate, a first-type dopant layer and a second-type dopant layer that are respectively disposed on two surfaces of the semiconductor substrate, a first passivation layer formed on the first-type dopant layer, a first anti-reflection layer formed on the first passivation layer, a plurality of back electrodes passing through the first anti-reflection layer and the first passivation layer, a second passivation layer formed on the second-type dopant layer, a second anti-reflection layer formed on the second passivation layer, and a plurality of front surface electrodes passing through the second anti-reflection layer and the second passivation layer. Widths of the back electrodes formed on a central area are smaller than those of the back electrodes formed on side areas.

Description

Technical field [0001] The invention relates to a solar cell, in particular to a back electrode design of the solar cell. Background technique [0002] Solar cells are currently the most mature and widely used green energy technology. In order to improve the power generation efficiency of solar cells and reduce power generation costs, various solar cell structures have been continuously developed. Solar cells can be roughly divided into three types: silicon-based solar cells, compound semiconductor solar cells, and organic solar cells. Among them, silicon-based solar cells are the most mature and popular. In particular, the conversion efficiency of silicon monocrystalline solar cells is even higher. The crown of all solar cells. [0003] At present, there are more than a dozen types of silicon solar cells with high conversion efficiency have been published. Among them, the possibility of commercial-scale mass production is roughly the Hetero-junction with Intrinsic Thin Layer Sola...

AI Technical Summary

Problems solved by technology

Please refer further figure 2 and Figure 4 , are the schematic diagram of rotational dislocation (2) and the schematic diagram of translational dislocation (2), respectively. When the degree of dislocation has resulted in the erosion hole 92 ablated by the laser being not completely covered by the back electrode 91, even if only a small part of the erosion hole 92 is not completely covered is completely covered by the back electrode 91, the conversion efficiency of the solar cell will still decrease significantly

In the field of solar cells, even if the conversion efficiency is only reduced by 0.1%, since the power generation of solar power plants is measured in millions of watts, the total power generation wattage will be significantly reduced, resulting in an increase in the cost of power generation per watt

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