Solar cell and manufacture method thereof

Abstract

The invention discloses a solar cell which comprises a semiconductor substrate, an emitter layer, at least one first electrode, at least one second electrode and a dielectric layer, wherein the semiconductor substrate is provided with a first surface, a second surface opposite to the first surface as well as at least one through channel penetrating through the first surface and the second surface; the emitter layer is formed on the first surface, the second surface and the through channel of the semiconductor substrate; a pn junction is formed between the semiconductor substrate and the emitter layer; the first electrode is formed on the through channel, the first surface and the second surface and is contacted with the emitter layer; the second electrode is formed on the second surface and electrically connected with the semiconductor substrate; the dielectric layer is formed in the through channel and located between the emitter layer and the first electrode to isolate the first electrode from the pn junction, so that the conversion efficiency of the solar cell is increased.

Description

technical field [0001] The invention relates to a photovoltaic module and a manufacturing method thereof, in particular to a solar cell and a manufacturing method thereof. Background technique [0002] The rise in global energy prices and the promotion of sustainable use of resources have made green energy an important part of technological development. Among them, solar power generation has lower environmental restrictions and is easier to popularize. Solar power converts light energy into electrical energy through solar cells. Therefore, improving the conversion efficiency of solar cells to provide more and cheaper electrical energy is the main direction of the industry's current development. [0003] refer to figure 1 , which is a schematic diagram of the structure of a conventional solar cell. The manufacturing process of the conventional solar cell 1 is briefly described as follows: first, a semiconductor substrate 10, such as a p-type semiconductor substrate, is prov...

AI Technical Summary

Problems solved by technology

Although the conventional metal penetrating solar cell can arrange the first electrode on the backlight surface on the same side as the second electrode, so as to reduce the area of ​​the light-receiving surface of the solar cell shaded by the metal electrode and improve the conversion efficiency of the solar cell, however, Conventional metal penetrating solar cells tend to cause the filling electrode of the through channel to burn through the emitter layer during the sintering process, and at the same time be in contact with the emitter layer and the semiconductor substrate, resulting in problems such as leakage or short circuit

In addition, conventional metal penetrating solar cells also have problems such as conversion efficiency and product reliability cannot be effectively improved

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