Solar cell

Abstract

A solar cell is disclosed, comprising a silicon chip substrate, a back electrode, a doped silicon layer and an upper electrode, wherein the silicon chip substrate is provided with a first surface and a second surface which is arranged opposite to the first surface, wherein the second surface of the silicon chip substrate is provided with a plurality of three dimensional nanostructures which are a plurality of bar-shaped protruding structures arranged at an interval, and the cross section of each bar-shaped protruding structure is shaped like a bow; the back electrode is arranged on the first surface of the silicon chip substrate and is in ohmic contact with the first surface; the doped silicon layer is arranged on the second surface of the silicon chip substrate; the upper electrode is arranged on at least part of the surface of the doped silicon layer.

Description

technical field [0001] The invention relates to a solar cell. Background technique [0002] Solar energy is one of the cleanest energy sources today, inexhaustible and inexhaustible. The utilization of solar energy includes light energy-thermal energy conversion, light energy-electric energy conversion and light energy-chemical energy conversion. A solar cell is a typical example of light-to-electricity conversion, which is made using the photovoltaic principle of semiconductor materials. According to different types of semiconductor photoelectric conversion materials, solar cells can be divided into silicon-based solar cells, gallium arsenide solar cells, organic thin-film solar cells, and the like. [0003] At present, solar cells are dominated by silicon-based solar cells. A solar cell in the prior art includes: a back electrode, a silicon wafer substrate, a doped silicon layer and an upper electrode. In the solar cell, the silicon wafer substrate and the doped silico...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, since the surface of the doped silicon layer is a flat planar structure, its surface area is relatively small, so the light-taking area of ​​the solar cell is relatively small.

In addition, when sunlight is incident on the surface of the doped silicon layer from the outside, a part of the light irradiated on the doped silicon layer is absorbed, a part is reflected, and the reflected light cannot be reused, so the solar cell is sensitive to light. low utilization

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