Solar cell and method for fabricating the same

Abstract

A solar cell and a method for fabricating the same are described. A pyramid structure is formed on a silicon substrate. A laser treatment is performed on the pyramid structure, so that a top portion of the pyramid structure has an arc shape, and a round is formed at a crest line of the pyramid structure. Films formed during subsequent processes hence have a uniform thickness and conversion efficiency of the solar cell is improved.

Description

technical field [0001] The invention relates to a photoelectric element, and in particular to a solar cell capable of improving photoelectric conversion efficiency and a manufacturing method thereof. Background technique [0002] Solar energy is an energy source that is inexhaustible and non-polluting. It has always been the focus of attention when solving the problems of pollution and shortage of petrochemical energy. Solar cells (solar cells) can directly convert solar energy into electrical energy, and have become a very important research topic at present. [0003] A silicon-based solar cell is a common type of solar cell in the industry. The principle of silicon-based solar cells is to add high-purity semiconductor materials (silicon) to some impurities to make them exhibit different properties, so as to form p-type semiconductors and n-type semiconductors, and connect the pn-type semiconductors, so that A p-n junction is formed. The p-n junction is composed of posit...

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Problems solved by technology

However, the use of etching to remove the sharp angle at the bottom of the pyramid also increases the angle at the top of the pyramid structure, resulting in an increase in reflectivity and a decrease in photocurrent

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