Solar battery

Abstract

Disclosed is a solar cell, which comprises a substrate, a buffer layer, recess patterns and a metal layer, wherein a p-n doped structure is arranged in the substrate, the buffer layer is formed on the substrate, the recess patterns are formed in the buffer layer, materials of the buffer layer comprise, but not limited to, silicon oxide (SiO2), silicon nitride (SiNX), a silicon oxynitride layer or the combination thereof, the optimal thickness of the buffer layer is 50-70 nanometers, the buffer layer is formed by sputtering, and the metal layer is formed on the buffer layer and is filled with the recess patterns.

Description

technical field [0001] The present invention relates to a solar cell (Solar Cell), in particular to a buffer layer formed on the back of a silicon wafer to reduce the structural stress based on the thinned solar cell, thereby effectively improving the stress caused by the substrate. Bending phenomenon of solar cells. Background technique [0002] Recently, the shortage of energy in the world has led to the continuous soaring of oil prices. Countries all over the world are actively investing in the development of energy-saving products, such as solar cells (Solar cells) are the products of this trend. Under the problems of oil and environmental protection (global greenhouse effect), the global sales of solar cells have grown several times. A solar cell is an optoelectronic semiconductor component that converts light energy into electrical energy. The conversion mechanism is: solar radiation irradiates the solar cell, causing electrons and holes to move to the p-doped region ...

AI Technical Summary

Problems solved by technology

However, solar cells made of ultra-thin silicon chips are prone to chip bending due to external forces due to their thin thickness, which indirectly affects the structure, conversion efficiency and reliability of the entire solar cell

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