Dye-sensitized solar cell double-layer composite film electrode with high photoelectric conversion efficiency and preparation method

Abstract

A dye-sensitized solar cell double-layer composite film electrode with high photoelectric conversion efficiency and a preparation method thereof. The double-layer composite membrane electrode uses fluorine-doped tin oxide transparent conductive glass as a matrix. In the double-layer composite membrane electrode, the bottom layer is a P25 nanoparticle film layer to ensure good electrical contact between the composite membrane electrode and the conductive glass substrate, and the upper layer is a TiO2 hollow sphere scattering layer to ensure the light scattering ability of the composite membrane electrode. The preparation method is to first prepare P25 nanoparticles and TiO2 hollow spheres into a slurry, coat the P25 slurry on the conductive glass substrate, dry it in the air, and then place it in a muffle furnace for calcination to form a dense P25 nanoparticle film. ; Then coat the TiO2 hollow spherical membrane layer on the P25 nanoparticle membrane layer, dry it in the air and place it in a muffle furnace for calcining to form a double-layer composite membrane electrode. The prepared double-layer composite film electrode has high photoelectric conversion efficiency after being sensitized and assembled into a dye-sensitized solar cell. The method has the advantages of low preparation cost, environmental friendliness and simple operation.

Description

technical field [0001] The invention relates to a double-layer composite film electrode of a dye-sensitized solar cell with high photoelectric conversion efficiency and a preparation method thereof. technical background [0002] In recent years, with the shrinking of energy reserves and the increasing environmental pollution, people's demand for new clean energy is increasing. On the basis of the first and second generation photovoltaic solar cells, scientists proposed and developed the third generation of solar cells, namely dye-sensitized solar cells. Compared with the first-generation and second-generation solar cells, the preparation process of this battery is simpler, the cost is lower, it can be loaded on a flexible substrate, and it is more friendly to environmental protection. Therefore, research on dye-sensitized solar cells has attracted much attention. [0003] Titanium dioxide is one of the best film materials widely used in dye-sensitized solar cells because o...

AI Technical Summary

Problems solved by technology

However, TiO 2 The solid spherical film electrode is also limited by two problems when further improving the photoelectric conversion efficiency of the battery

First of all, when these large-sized solid spheres are directly used as membrane electrodes, the electrical contact between the membrane electrodes and the conductive glass substrate is poor, resulting in a decrease in short-circuit photocurrent; secondly, the solid spheres themselves are not conducive to the rapid transport of electrolytes, thus affecting The rapid progress of the entire battery process, resulting in a decrease in the open circuit voltage

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