Amorphous silicon/crystalline silicon heterojunction solar cell and preparation method thereof

Abstract

The invention provides an amorphous silicon / crystalline silicon heterojunction solar cell and a preparation method thereof, and the preparation method comprises the steps: preparing an amorphous silicon / crystalline silicon heterojunction structure, and enabling the upper surface and the lower surface of the amorphous silicon / crystalline silicon heterojunction structure to respectively comprise a central region and an edge region surrounding the central region; preparing a transparent conductive oxide film to cover the central region, and at least exposing an edge region of one of the upper surface and the lower surface of the amorphous silicon / crystalline silicon heterojunction structure; forming a metal electrode; and forming a covering film, wherein the covering film at least covers theexposed edge region. According to the invention, the chemical inertness and optical refractive index of silicon nitride, silicon oxide and silicon oxynitride are controllable; the stability of the amorphous silicon / crystalline silicon heterojunction solar cell is maximized, and the antireflection effect is optimized, so that the dual purposes of improving the stability and photoelectric conversionefficiency of the amorphous silicon / crystalline silicon heterojunction solar cell are achieved, and the amorphous silicon / crystalline silicon heterojunction solar cell has the advantages of low costand high stability.

Description

technical field [0001] The invention belongs to the field of amorphous silicon / crystalline silicon heterojunction solar cells, and relates to an amorphous silicon / crystalline silicon heterojunction solar cell and a preparation method. Background technique [0002] Solar cell power generation has the characteristics of small regional differences, huge reserves, safety, no pollution, and inexhaustible resources. It has become the main force of new energy and renewable energy technologies in the 21st century. There are many types of solar cells. At present, silicon-based solar cells are the mainstream, including crystalline silicon solar cells and thin-film silicon solar cells. The development direction of solar cells mainly focuses on improving efficiency, increasing service life and reducing cost. Improving service life and photoelectric conversion efficiency can not only reduce the production cost per unit of power generation, but also reduce the cost of installation and lan...

AI Technical Summary

Problems solved by technology

[0003] Amorphous silicon / crystalline silicon heterojunction solar cell is a high-efficiency solar cell, referred to as HITR (Heterojunctionwith Intrinsic Thin-layer) or SHJ (Silicon Hetero Junction), the latter is mostly used in China, however, the existing amorphous silicon / Crystalline silicon heterojunction solar cells often have signs of decay, which seriously affect the service life and economic benefits of amorphous silicon / crystalline silicon heterojunction solar cells

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