Solar cell

Abstract

The present invention provides a solar cell. A plurality of stripe ribs having the same materials are made at the lower surface of a transparent top electrode to allow the top electrode to partly form a T-shaped structure, the lower surfaces of a P-shaped amorphous silicon thin film, an intrinsic amorphous silicon film, an N-type amorphous silicon thin film and a transparent conductive transition film at the lower portions of the ribs are bulged downwards to form stripe bumps, and the contact surface of a bottom electrode at the corresponding position and the transparent conductive transition film has stripe arc reflection surfaces being in one-to-one correspondence with the ribs. The top electrode penetrates into the thin film to improve the collection ability of electrode to current; thin-film materials deposited on the electrodes form arc bumps to add the area of a film cell and increase the illuminated face of the cell; and the metal bottom electrode has a back reflection surface with a concave mirror structure to increase utilization of reflection light by the cell so as to improve light absorption and utilization by the cell and further improve the cell conversion efficiency.

Description

technical field [0001] The invention relates to a solar cell and belongs to the technical field of solar cells. Background technique [0002] Photons, electrons, and phonons are all carriers of energy. As a photoelectric energy conversion device, solar cells mainly exchange energy between photons and electrons, and at the same time, phonons participate in this exchange process. This energy interaction mainly occurs within a few microns on the surface of solar cell materials, which provides a physical basis for manufacturing thin-film solar cells. [0003] Amorphous silicon thin-film solar cells have become one of the most attractive silicon-based solar cells to reduce the cost of solar cells because of their advantages of significantly reducing the amount of silicon used and the low temperature of the manufacturing process. However, compared with other silicon-based solar cells, the conversion efficiency of amorphous silicon thin-film solar cells is low. [0004] Generall...

AI Technical Summary

Problems solved by technology

The thin film electrode prepared in this way has a simple preparation method and stable performance, but the electrode in this way has limited improvement in battery performance.

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