Wide-spectrum high-absorption solar cell

Abstract

The invention discloses a wide-spectrum high-absorption solar cell, which is a semiconductor photovoltaic device and comprises an intrinsic absorption layer of specific thickness. The thickness of theintrinsic absorption layer is determined by the light trapping efficiency of a photonic crystal. The device is sequentially provided with a substrate layer, an insulating buried layer, a top absorption layer (like a Si layer) and an anti-reflection film layer from bottom to top; ions are injected into the two sides of a top absorption region of the device to form a p-type doped region and an n-type doped region respectively, a p electrode is formed on the p-type doped region, and an n electrode is formed on the n-type doped region; the intrinsic absorption layer is arranged between the p-typedoped region and the n-type doped region; periodic air holes are formed in the surface of the intrinsic absorption layer to form photonic crystals; the specific period and the etching depth of the periodic air holes are calculated according to requirements, an incident light wavelength range and a theory; the periodic air holes can be made into cylindrical holes or conical holes; another semiconductor material (like Ge) is filled in the periodic air holes. The solar cell has the advantages of wide absorption spectrum, high absorption efficiency, high integration level, multiple functions andthe like, and is suitable for ultraviolet, visible light and near-infrared bands.

Description

technical field [0001] The invention relates to the technical field of semiconductor optoelectronic devices, and specifically designs a multifunctional solar cell with high absorption efficiency in ultraviolet, visible light and near-infrared bands. Background technique [0002] Energy is the cornerstone of the existence and development of modern society. Solar energy is an inexhaustible renewable energy source for human beings. It has the advantages of sufficient cleanliness, absolute safety, relative universality, and adequacy of resources. Photovoltaic power generation is a new power generation method that directly converts clean energy—solar energy into electrical energy, and its core is solar cells. The application of solar cells has entered the industry, commerce, agriculture, communications, household appliances and public facilities from the military and aerospace fields, especially in remote areas, mountains, deserts, islands and rural areas to save expensive tran...

AI Technical Summary

Problems solved by technology

However, at this stage, there is still a lot of room for development in terms of conversion efficiency, process difficulty, manufacturing cost, and service life of solar cells.

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