N-type crystalline silicon solar cell and preparation method thereof, and photovoltaic module

Abstract

The invention discloses an N-type crystalline silicon solar cell and a preparation method thereof, a photovoltaic module, belonging to the technical field of solar cells. The N-type crystalline silicon solar cell comprises a front electrode, a front passivation layer, an emitter, an N-type crystalline silicon substrate, a back passivation layer and a back electrode, wherein the front passivation layer comprises a gallium oxide layer in direct contact with the emitter. In this solar cell, the P-type silicon surface of the emitter of the N-type crystalline silicon solar cell is chemically passivated and field passivated by the negative charge carried by the gallium oxide layer, reducing the minority carrier recombination rate at the P-type silicon surface, Furthermore, the gallium oxide layer is utilized to reduce the absorption of incident light and improve the photocurrent density of the solar cell, thereby increasing the voltage and current of the solar cell, improving the photoelectric conversion efficiency of the solar cell, further increasing the output power of the photovoltaic module, reducing the power cost and improving the performance-price ratio of the photovoltaic powergeneration.

Description

technical field

[0001] The invention relates to the technical field of solar cells, in particular to an N-type crystalline silicon solar cell, a preparation method, and a photovoltaic module. Background technique

[0002] Photovoltaic power generation, which directly converts solar energy into electricity, is a clean, sustainable and relatively cost-effective way of generating electricity. Crystalline silicon solar cells are an important part of photovoltaic power generation systems. The photoelectric conversion efficiency of crystalline silicon solar cells has an important impact on the output power and cost of electricity of photovoltaic power generation.

[0003] According to the type of central crystalline silicon substrate in crystalline silicon solar cells, crystalline silicon solar cells can be divided into P-type crystalline silicon solar cells and N-type crystalline silicon solar cells. Among them, the N-type crystalline silicon solar cell mainly includes a front e...

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