Zinc porphyrin supramolecular dye sensitizer and preparation method and application thereof

Abstract

The invention belongs to the technical field of solar cells, and particularly relates to a zinc porphyrin supramolecular dye sensitizer, a preparation method and application thereof. Zinc porphyrin chromophores, which are used as antenna molecules, and 4-pyridyl benzoic acid anchoring molecules are subjected to zinc porphyrin supermolecule self-assembly on the surface of photo-anode TiO2 to obtainthe dye sensitizer, the structure of the dye sensitizer is shown in a formula A shown in the description, and then, the dye sensitizer is applied to a dye-sensitized solar cell. According to the invention, the zinc porphyrin chromophores, which are used as antenna molecules, and the 4-pyridyl benzoic acid anchoring molecules are subjected to zinc porphyrin supramolecular self-assembly to construct the zinc porphyrin supramolecular dye sensitizer, so that complex synthesis steps of common dye sensitizers are effectively reduced, and the photon trapping performance of a device is improved.

Description

technical field [0001] The invention relates to the technical field of solar cells, in particular to a zinc porphyrin supramolecular dye sensitizer and its preparation method and application. Background technique [0002] In recent years, because the rapid economic development has also brought serious environmental pollution and energy shortages, people have shown increasing interest in the development and utilization of new energy. New energy has advantages that traditional energy cannot match, such as abundant sources, easy development, environmental friendliness, and recycling. Generally speaking, new energy includes wind energy, water energy, tidal energy, solar energy, nuclear energy, etc. Among them, the potential of renewable energy mainly based on solar energy is huge. At the same time, solar energy is easy to collect and has no pollution. Its reserves can be used for tens of billions of years. , photovoltaic power generation is one of the important ways to utilize ...

AI Technical Summary

Problems solved by technology

Although dye-sensitized solar cells have been greatly developed, the current photoelectric conversion efficiency is still far from the theoretical efficiency, and the dye sensitizers are limited to single-layer dyes, such as the more mature ruthenium pyridine dyes, Metalloporphyrin dyes and pure organic dyes, etc.

Although the photoelectric conversion efficiency of the battery device based on the pure organic dye ADEKA-1 has reached 14.3%, due to the limitation of the photon harvesting ability of the monolayer dye itself, it is difficult to make a major breakthrough in the battery efficiency.

Traditional dyes will be designed into the basic D-π-A structure, and people can improve the electron donor part, bridging group and electron acceptor part in it to improve the photon capture ability of the device, but in order to reach the near-infrared region However, it is very difficult and will be restricted by factors such as energy level matching. Therefore, the development of new and efficient dye sensitizers and sensitization technologies has very important scientific significance for improving the overall performance of dye-sensitized solar cells.

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