An electrode of quantum dot sensitization solar battery and the corresponding preparation method

Abstract

The invention relates to an electrode of a quantum dot-sensitized solar cell and the preparation method, octadecene, tributyl phosphate and selenium powder are mixed to prepare a selenium precursor; oleic acid, octadecene and cadmium oxide power are mixed to prepare a cadmium precursor; the nano titanium dioxide powder is dispersed in an octadecene solution of titanium dioxide which is prepared in the octadecene, the octadecene solution of the titanium dioxide is washed and dried in the mixed solution of cadmium precursor and selenium precursor so as to obtain a quantum dot-sensitized titanium dioxide nanocrystal; the quantum dot-sensitized titanium dioxide powder and a non-ionic surfactant are mixed and ground to prepare a paste, the paste is evenly coated on a transparent conductive substrate to form a thin film, and finally sintering is carried out. As the quantum dots are directly in-situ synthesized at the surface of titanium dioxide, the quantum dots are closely combined with the titanium dioxide particles, thus the invention is beneficial to the improvement of the stability of the cell and the photoelectric conversion efficiency; furthermore, the quantum dots which are generated under an oily system have very high crystallinity and luminous efficiency, thus the invention is beneficial to the further improvement of the efficiency of the solar cell.

Description

technical field [0001] The invention belongs to the field of dye-sensitized solar cell materials, and in particular relates to a quantum dot-sensitized solar cell electrode and a preparation method thereof. Background technique [0002] With the increasing severity of the global energy crisis, people are eager to find a sustainable clean energy source. Solar energy, as an inexhaustible natural energy source, has increasingly attracted the attention of countries all over the world. Compared with traditional silicon solar cells, dye-sensitized solar cells have low cost and simple fabrication, and have become a research hotspot of scholars from all over the world. In the fabrication process of dye-sensitized solar cells, one of the key steps is to sensitize the wide bandgap semiconductor film. [0003] The dyes traditionally used for sensitization are mostly organic dyes or organometallic complexes, but the absorption spectrum of these dyes is discontinuous and poor in stabil...

AI Technical Summary

Problems solved by technology

In the first preparation method, the quantum dots are combined by adsorption, and the stability of the battery is poor. In the second preparation method, the size of the quantum dots is adjusted by the concentration of the salt solution, and the generated quantum dots have poor crystallinity. low conversion efficiency

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