Dual-electron and dual-hole transport layers-based organic solar cell and preparation method thereof

Abstract

The invention provides a dual-electron and dual-hole transport layers-based organic solar cell and a preparation method thereof, and belongs to the technical field of organic solar cells. The organic solar cell sequentially comprises an ITO conductive glass substrate, a PFN / polyfluorene material PFBT dual-electron transport layer, a PCDTBT:PCBM active layer, an MoO3 / graphene oxide dual-hole transport layer and a graphite anode from bottom to top. According to the method, an amphiphilic polyfluorene material PFBT with high conductivity and PFN are combined as the dual-electron transport layer; traditional inorganic transport layers of TiO2, ZnO and the like are replaced; interface contact with ITO is improved; interface composition is reduced; and the organic solar performance is improved. Meanwhile, MoO3 and graphene oxide are combined as the hole transport layer; a layer of graphite electrode is sprayed on the surface of the graphene oxide by an inkjet printing technology; the method is simple in use and suitable for large-area popularization; meanwhile, traditional materials of Au, Ag, Al and the like are replaced with graphite; and a metal-semiconductor contact does not exist, so that the interface is free of a schottky barrier; the energy loss in a device is reduced; and the performance of the device is improved.

Description

technical field [0001] The invention belongs to the technical field of organic solar cells, and in particular relates to an organic solar cell based on a double-electron and double-hole transport layer and a preparation method thereof. Background technique [0002] Organic solar cells have been widely researched and reported due to their unique advantages of flexibility, low cost, bendability, and large-area printing production. The inverse organic solar cells based on the blend system have achieved high energy conversion efficiency. The shortcomings of unbalanced carrier transport, traditional inverse organic solar cells generally use inorganic oxides as the transport layer, however, the inherent defects of the inorganic oxide itself, and the shortcomings of the sol condensation method make the prepared batteries have high carrier Recombination, low exciton transport ability and other shortcomings. To solve the shortcomings brought about by the inorganic transport layer an...

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Problems solved by technology

[0002] Organic solar cells have been widely researched and reported due to their unique advantages of flexibility, low cost, bendability, and large-area printing production. The inverse organic solar cells based on the blend system have achieved high energy conversion efficiency. The shortcomings of unbalanced carrier transport, traditional inverse organic solar cells generally use inorganic oxides as the transport layer, however, the inherent defects of the inorganic oxide itself, and the shortcomings of the sol condensation method make the prepared batteries have high carrier Disadvantages such as recombination and low exciton transport ability

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