Preparation method of IBC solar cell

Abstract

The present invention discloses a preparation method of an IBC solar cell. The method comprises the steps of: performing texture surface making and texturing of a silicon substrate, and performing double-sided preparation of a mask layer; performing back surface laser etching opening, and performing boron diffusion to form a back surface emitting electrode; performing laser doping to form a heavydoping selectivity emitting electrode area; removing the double-sided mask layer and a borosilicate glass layer; performing double-sided preparation of a mask layer, performing back surface laser etching opening, and performing phosphorus diffusion to form a back surface field; removing the double-sided mask layer and a phosphorosilicate glass layer; performing double-sided preparation of a passivation layer and an anti-reflection layer; and performing double-sided preparation of a metal electrode, and obtaining an IBC solar cell. The preparation method of an IBC solar cell is simple in preparation process, simplifies the cell preparation process, can avoid damaging of the silicon substrate, can improve the production efficiency and can greatly reduce the recombination current of the emitting electrode.

Description

technical field [0001] The invention belongs to the technical field of solar energy, in particular to a preparation method of an IBC solar cell. Background technique [0002] Conventional fossil fuels are being exhausted day by day. Among the existing sustainable energy sources, solar energy is undoubtedly the cleanest, most common and most potential alternative energy source. A solar cell, also known as a photovoltaic cell, is a semiconductor device that converts the sun's light energy directly into electrical energy. Because it is a green product, does not cause environmental pollution, and is a renewable resource, solar cells are a new energy source with broad development prospects in today's energy shortage situation. At present, among all solar cells, crystalline silicon solar cells are one of the solar cells that have been widely commercialized. This is due to the extremely abundant reserves of silicon materials in the earth's crust. Cells have excellent electrical a...

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Problems solved by technology

Another technique is to form back doping in a certain pattern by ion implantation. However, this technique will cause structural damage to the crystalline silicon substrate, resulting in surface amorphization or the introduction of point defects.

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