Tandem solar cell and its preparation method

Abstract

The invention provides a preparation method of a layered solar cell. The preparation method includes the following steps of providing a substrate, forming a front electrode on the substrate, and sequentially forming a first P-type doping layer, a first intrinsic layer and a first N-type doping layer on the front electrode to make up a first P-I-N junction; conducting plasma oxidation treatment on the surface of the first P-I-N junction to form an oxide layer; sequentially forming a second P-type doping layer, a second intrinsic layer and a second N-type doping layer on the oxide layer to make up a second P-I-N junction; and forming a back electrode on the second P-I-N junction. Correspondingly, the invention further provides a layered solar cell structure. According to the layered solar cell and the preparation method of the layered solar cell, conversion efficiency of the layered solar cell can be effectively improved, the process is simple, the cost is low, and the layered solar cell can be compatible with production equipment of a layered solar cell in the prior art.

Description

technical field [0001] The invention relates to the field of solar cells, in particular to a stacked solar cell and a preparation method thereof. Background technique [0002] Silicon-based thin-film solar cells use less materials and low energy consumption. Solar cells with P-I-N or N-I-P structures can be prepared on inexpensive substrates such as glass, stainless steel, and plastic. Hope for solar cell costs. However, due to the light-induced degradation effect of amorphous silicon materials, the stability of silicon-based thin-film solar cells needs to be improved, and the stable photoelectric conversion efficiency of the current industrialized amorphous silicon single-junction solar cells is still low. Therefore, how to improve the photoelectric conversion efficiency of silicon-based thin-film solar cells becomes the key to whether such cells can be developed on a large scale in the future. [0003] In response to the above problems, solar cell researchers have propos...

AI Technical Summary

Problems solved by technology

Since this method requires more precise control of the thickness of the composite layer and the doping ratio, it is not suitable for preparing tandem solar cells on large-area substrates, which affects the mass production of tandem solar cells.

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