Dye sensitization solar cell based on synergetic catalytic binary redox couple

Abstract

The invention discloses a dye sensitization solar cell based on synergetic catalytic binary redox couple. The dye sensitization solar cell comprises a substrate, a transparent electrode, a metallic oxide photo-anode, dyes, a counter electrode and an electrolyte which is capsulated between the photo-anode and the counter electrode. The electrolyte contains mutually synergetic catalytic binary redox couple , such as organic compounds which contain hydrosulphonyl and organic P-type semiconductor. Two kinds of materials which form the binary redox couple are coupled on the molecule level, so that redox reaction with mutual catalytic reaction can be achieved, and electron transfer reaction inside the solar cell is facilitated. Therefore, recombination between a photoproduction electron and a hole can be restrained and device performance can finally be improved.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cells (DSSC, Dye Sensitized Solar Cells), in particular to a dye-sensitized solar cell capable of synergistically catalyzing a binary redox couple. Background technique [0002] A solar cell is a device that directly converts light energy into electrical energy through the photoelectric effect or photochemical effect, also known as a photovoltaic cell. According to the principle and mechanism, solar cells can be divided into four types: silicon-based solar cells, inorganic compound semiconductor solar cells, dye-sensitized solar cells and organic solar cells. Among them, dye-sensitized solar cells have the advantages of simple manufacturing process, wide source of raw materials, low cost, and large-area flexible devices. In 1991, Brian O'regan and Michael of the EcolePolytechnique de Lausanne laboratory A dye-sensitized solar cell with a photoelectric conversion efficiency of 7% was reported...

AI Technical Summary

Problems solved by technology

But I - / I 3 - The redox couple is limited by the material itself: one is I - / I 3 - It is corrosive in itself, and it will corrode the metal material of the counter electrode during the working process, shortening the performance and life of the battery; the second is I - / I 3 - It will absorb part of the visible light, which reduces the ability of dye molecules to absorb sunlight, which is not conducive to further improving the photoelectric conversion efficiency

[0006] In addition, solar cells need to convert sunlight into electricity in order to cope with the increasingly severe energy and environmental crisis, while the traditional I - / I 3 - The material is obviously harmful to the environment, which is contrary to the original intention of solar cells to clean energy

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