Transition metal sulfide and graphene composite material counter electrode and preparation and application thereof

Abstract

The invention relates to a transition metal sulfide and graphene composite material counter electrode, preparation of the transition metal sulfide and graphene composite material counter electrode, and application of the transition metal sulfide and graphene composite material counter electrode in a dye sensitization solar cell. Conductivity and dispersity of a composite material can be improved when transition metal sulfide and graphene are effectively combined. The combined transition metal sulfide and graphene composite material is dispersed in an organic adhesive solution, an electrically-conductive substrate is coated with the composite material through the blade coating method, the electrically-conducive substrate where coating is conducted is dried, roasted for 2 hours to 10 hours under the argon or nitrogen atmosphere at the temperature of 350 DEG C to 500 DEG C and cooled to the room temperature, and then the transition metal sulfide and graphene composite material counter electrode of the dye sensitization solar cell is obtained. Compared with a Pt counter electrode, the transition metal sulfide and graphene composite material counter electrode has the advantages that materials of this type are abundant in the natural world, and mass industrial production can be achieved. Compared with materials of other semiconductor counter electrodes of the same type, the transition metal sulfide and graphene composite material has the advantages that the preparation method is easy and convenient, catalytic performance is excellent, and then the transition metal sulfide and graphene composite material has wide application prospects in the field of dye sensitization solar cells.

Description

technical field [0001] The invention relates to a counter electrode of a transition metal metal sulfide and graphene composite material, a preparation method thereof and an application in a dye-sensitized solar cell. Background technique [0002] In order to solve the increasingly severe energy crisis and environmental crisis, researchers are working to find economical and environmentally friendly fuel substitutes. Due to the characteristics of abundant resources, wide distribution and sustainable utilization of sunlight, people are constantly trying to convert solar energy into storable energy, which has triggered a research boom in solar cells. Among them, dye-sensitized solar cells have attracted widespread attention because of their low price, environmentally friendly materials, simple packaging process, and high photoelectric conversion efficiency. However, the available cost and achievable conversion efficiency of dye-sensitized solar cells still cannot meet the needs...

AI Technical Summary

Problems solved by technology

However, most transition metal sulfides (such as cadmium sulfide), which are semiconductor materials, do not have ideal electrical conductivity, and pure transition metal sulfides cannot effectively achieve rapid electron transport, which in turn limits the efficiency of redox conversion reactions on their surfaces.

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