Silicon heterojunction solar cell and manufacturing method thereof

Abstract

The invention discloses a silicon heterojunction solar cell and a manufacturing method of the silicon heterojunction solar cell to improve the passivation effect of the side face of the silicon heterojunction solar cell and improve the performance of the silicon heterojunction solar cell. The silicon heterojunction solar cell comprises a crystal silicon substrate, a first amorphous silicon passivation layer, a first transparent electrode, a first grid line electrode, a second amorphous silicon passivation layer, a second transparent electrode and a second metal electrode, and further comprises an edge passivation layer, wherein the first amorphous silicon passivation layer, the first transparent electrode and the first grid line electrode are sequentially arranged on the upper surface of the crystal silicon substrate, the second amorphous silicon passivation layer, the second transparent electrode and the second metal electrode are sequentially arranged on the lower surface of the crystal silicon substrate, and the edge passivation layer at least covers the same side faces of the crystal silicon substrate, the first amorphous silicon passivation layer and the second amorphous silicon passivation layer.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a silicon heterojunction solar cell and a manufacturing method thereof. Background technique [0002] A solar cell is a semiconductor device that can convert solar energy into electrical energy. Under the condition of light, a photogenerated current will be generated inside the solar cell, and the electrical energy will be output through the electrodes. In recent years, the production technology of solar cells has been continuously improved, the production cost has been continuously reduced, and the conversion efficiency has been continuously improved. Solar cell power generation, that is, photovoltaic power generation, has been widely used and has become an important energy source for power supply. Silicon heterojunction solar cell technology is a new type efficient battery technology. [0003] The passivation effect of the side of the silicon heterojunction solar cell in t...

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Problems solved by technology

[0003] The passivation effect of the side of the silicon heterojunction solar cell in the prior art is relatively poor, which causes the recombination of the side of the silicon heterojunction solar cell to increase, thereby causing the reverse current of the silicon heterojunction solar cell to increase, and the silicon heterojunction solar cell The open circuit voltage (Voc) and fill factor (FF) of silicon heterojunction solar cells are lower, which in turn leads to lower conversion effic

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