Composite carbon-based counter electrode for dye-sensitized solar cell and preparation method thereof

Abstract

The invention discloses a composite carbon-based counter electrode for a dye-sensitized solar cell and a preparation method thereof, and belongs to the technical field of a solar cell. A graphite carbon layer and a carbon nano-particle layer are formed in sequence on the surface of a conductive substrate; and the graphite carbon layer and the carbon nano-particle layer are combined to form a three-dimensional structure composite carbon-based counter electrode. The composite carbon-based counter electrode has higher redox activity; and when the composite carbon-based counter electrode is applied to the solar cell industry, material cost and preparation cost of the dye-sensitized solar cell can be reduced, and meanwhile, photoelectric conversion efficiency of an existing commercial platinumelectrode is realized. Compared with an existing carbon-based counter electrode, the preparation method has the advantages of low raw material, low energy consumption, short preparation period and being green and environmentally friendly, and solves the problem of poor adhesive force between a catalyst layer obtained through a conventional candle burning method and the conductive substrate and thesensitiveness problem of carbon-based flammable flame baking process parameters, thereby improving repeatability and consistency of the preparation process and facilitating large-scale preparation ofthe counter electrode.

Description

technical field [0001] The invention belongs to the technical field of solar cells, in particular to a high-efficiency and low-cost composite carbon-based counter electrode for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] Clean energy and green environmental protection have become the most important issues in the world in the 21st century. As an inexhaustible renewable energy source, solar energy has advantages that other types of energy sources cannot match. The high-efficiency and low-cost development and utilization of solar energy has attracted great attention from the global academic and industrial circles. Dye-sensitized solar cell (DSSC), as a new type of chemical solar cell, mainly consists of working electrode, electrolyte (I - / I 3 - ) and the counter electrode. The working electrode usually uses a nanoporous semiconductor electrode. The dye molecules on the working electrode absorb visible light under the action o...

AI Technical Summary

Problems solved by technology

The advantage of this method is that it is easy to operate and has certain effects. However, the carbon film produced in this way is directly deposited on the surface of the FTO substrate, which makes it difficult to ensure the uniformity of the carbon particle film on the FTO substrate. The adhesion on the substrate is relatively poor. What's more, the height of the candle flame and the deposition time have a great influence on the performance of the prepared carbon film on the electrode, and a small change will lead to a significant difference in the conversion performance. Therefore, The process controllability and repeatability of this method are poor, and industrial production cannot be realized

[0014] In summary, how to find a counter electrode material suitable for industrial production while taking into account performance, reduce the material cost and production cost of the counter electrode, and solve the problem of poor adhesion between the existing carbon-based counter electrode material and the glass substrate , which will become an urgent problem to be solved in this field

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