Semi-conductor electrode and method for making and solar cell containing the semiconductor electrode

Abstract

A semiconductor electrode for a dye-sensitized solar cell comprises a conductive bottom layer, a semiconductor nanometer crystal membrane formed on the conductive bottom layer, and a dye layer formed on the semiconductor nanometer crystal membrane. The semiconductor nanometer crystal membrane contains semiconductor particles and conductive particles; the conductive particles are composite conductive particles which contain metal particles and carbon particles, and the metal particles are loaded on the surface of the carbon particles. The invention also provides a method for preparing the semiconductor electrode and the dye-sensitized solar cell which contains the semiconductor electrode. The semiconductor nanometer crystal membrane contains the composite conductive particles which contain the carbon particles and the metal particles which are loaded on the surface of the carbon particles, thus improving the use efficiency of the metal particles. The metal particles can be used as capture wells for electrons, so that the electrons and cavities in the semiconductor are separated effectively, and the life of the electronic-cavity is prolonged and the photo-generated current is increased, thus enhancing the photoelectric conversion rate of the dye-sensitized solar cell.

Description

technical field [0001] The invention relates to a semiconductor electrode, a preparation method thereof and a dye-sensitized solar cell containing the semiconductor electrode. Background technique [0002] Today, when non-renewable energy sources such as electricity, coal, and oil are in short supply, free, clean and inexhaustible solar energy has attracted the attention of the world. Solar cells, a device that can directly convert solar energy into electrical energy, have become the field of many researchers. Silicon solar cells were first developed by Bell Laboratories in the United States and have high photoelectric conversion efficiency, so it became the first solar cell product to be industrially produced. However, the manufacturing process of silicon solar cells is complex, expensive and the raw material silicon is increasingly scarce, which restricts its wide application. Swiss Institute of Technology Lausanne Professor and others first proposed the concept of dye...

AI Technical Summary

Problems solved by technology

According to this dye-sensitized solar cell electrode, conductive particles are added to the semiconductor nanocrystal film, and the conductivity of the conductive particle is utilized. Although the conductivity of the semiconductor nanocrystal film can be improved to a certain extent, the utilization rate of the conductive particle is not high. Therefore, the conductivity of the semiconductor nanocrystalline film is still not high, and the photoelectric conversion rate of the dye-sensitized solar cell is low.

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