Thin-film solar cell

Abstract

A thin-film solar cell comprises a glass substrate, a transparent conductive layer, a photoelectric absorption layer and a back electrode layer sequentially from bottom to top, and is characterized in that the transparent conductive layer is made of metal nanowires; the photoelectric absorption layer is an amorphous silicon, a microcrystalline silicon or a cadmium telluride thin film. According to the thin-film solar cell of the invention, the metal nanowire replaces a semiconductor transparent conductive film, such as AZO, ITO, FTO and the like, and thus, at the transmittance premise, resistance of the film layer is greatly reduced, lateral collection of photocarriers is more facilitated, resistance of a cell device is reduced, and the photoelectric conversion efficiency of the solar cell is improved.

Description

technical field

[0001] The invention relates to the field of thin-film solar cells, in particular to a thin-film solar cell whose transparent conductive film is metal nanowires. Background technique

[0002] The transparent conductive layer of thin-film solar cells is made of semiconductor materials, such as ITO, FTO, AZO, etc. Under the premise of realizing the light transmittance requirements of solar cells, it cannot avoid the existence of resistance caused by its own material factors, making solar cell devices as lateral photoelectric However, the carrier collection efficiency of the collection device is not high, which becomes the bottleneck affecting its photoelectric conversion efficiency. The conductivity of metal is far superior to that of semiconductors. At the same time, if the metal is made into a nanowire structure and arranged on a glass substrate as a light-transmitting and conductive solar window layer, it can achieve superior performance compared to traditio...

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