Solar cell based on graphene-metal nanoparticle composite material

Abstract

The invention provides a solar cell based on a graphene-metal nanoparticle composite material. The solar cell comprises a substrate, a graphene layer, a metal nanoparticle array, a positive metal electrode, and a negative metal electrode, wherein the substrate comprises a silicon (Si) layer and a silicon dioxide (SiO2) layer formed on the Si layer, a window is formed in the middle of the SiO2 layer, and the window is deep enough to reach the surface of the Si layer; the graphene layer is formed in the window and on the SiO2 layer on the two sides of the window; the metal nanoparticle array is formed on the graphene layer formed in the window; the positive metal electrode is formed on the SiO2 layer on the two sides of the window and covers one part of the graphene layer; the negative metal electrode is formed under the Si layer on the surface of the substrate. The solar cell based on the graphene-metal nanoparticle composite material has the advantages of simple structure and simplified forming process; meanwhile, the electrical conductivity of the graphene can be improved so that the properties of a graphene-silicon schottky junction solar cell can be improved.

Description

technical field [0001] The invention relates to the technical fields of graphene composite materials and solar photovoltaics, in particular to a solar cell based on graphene-metal nanoparticle composite materials. Background technique [0002] Graphene is a new type of carbon material developed in recent years. It has many excellent properties, such as extremely high carrier mobility, good electrical conductivity, high light transmittance, and good mechanical and chemical properties. It has broad application prospects in many aspects. In recent years, graphene-silicon Schottky junction solar cells have effectively utilized graphene's extremely high carrier mobility, good electrical conductivity, and good optical properties due to its avoidance of complex processes such as diffusion and ion implantation. Transmittance and other advantages have become the focus of research by scientific and technological workers at home and abroad. However, due to the relatively low work fun...

AI Technical Summary

Problems solved by technology

However, due to the relatively low work function of graphene and the relatively high resistivity compared to traditional ITO transparent conductive films, the efficiency of graphene-based solar cells is still relatively low compared to traditional crystalline silicon p-n junction solar cells. Large gap, limiting the application of this new type of solar cell

Through graphene dopants, such as nitric acid, bis(trifluoromethane)sulfonimide, sulfur oxychloride, gold chloride, etc., the performance of graphene-silicon cells can be improved to a certain extent, but the existing graphite Alkene dopants have the disadvantages of being volatile, unstable, toxic or difficult to obtain, and it is difficult to meet the needs of practical applications.

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