An ultra-small textured solar cell combined with zinc oxide nanostructure and its preparation method

Abstract

The invention discloses a super-small suede solar cell combined with a zinc oxide nanostructure and a preparation method of the super-small suede solar cell combined with the zinc oxide nanostructure. The solar cell comprises a silicon wafer, a PN junction, the zinc oxide nanostructure, a passivation layer, silver paste and aluminum paste, wherein the surface of the silicon wafer is provided with super-small suede; the PN junction is formed at the position, close to the nanometer super-small suede structure, of the silicon wafer; the zinc oxide nanostructure grows in the surface and gaps of the super-small suede; the passivation layer is arranged on the side, provided with the super-small suede, of the silicon wafer; the silver paste is arranged on the side, provided with the super-small suede, of the silicon wafer to form a front electrode of the solar cell; the aluminum paste is arranged on the side, not provided with the super-small suede, of the silicon wafer to form a back electrode of the solar cell. According to the super-small suede solar cell, through combination with zinc oxide nanorods, absorption of photons at a short waveband can be further enhanced. Besides, since the gaps of the silicon-based micro-nano structure are filled with zinc oxide, on one hand, the electrode contact area is effectively increased, and good electrode contact is formed; on the other hand, transverse carrier transportation of the super-small suede cell can be enhanced, and meanwhile a certain passivation effect is achieved. The efficiency of the silicon-based nanostructure solar cell is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of high-efficiency crystalline silicon solar cells, and in particular relates to a high-efficiency enhanced ultra-small textured solar cell combined with a transparent conductive zinc oxide nanostructure and a preparation method thereof. Background technique [0002] In recent years, the environmental problems of energy shortage and global warming have become increasingly serious, and human beings have an unprecedented demand for clean and renewable energy. Photovoltaic solar energy is an important renewable energy, which has many advantages such as extensive energy, less geographical restrictions, safety and reliability. [0003] At present, the solar cells used in the market are mainly crystalline silicon cells, but high cost is still the bottleneck restricting the development of the photovoltaic industry. Therefore, how to improve efficiency and reduce costs has become the focus of solar cell research. ...

AI Technical Summary

Problems solved by technology

[0007] The invention proposes an ultra-small textured solar cell combined with zinc oxide nanostructure and its preparation method, which not only has good light-trapping performance, but also can overcome the disadvantages of poor self-electrode contact performance and low carrier collection efficiency, and can be low-cost Large-scale preparation has great market application prospects

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