Photo-responsive gel electrolyte and preparation method and application thereof

Abstract

The invention provides a photo-responsive gel electrolyte and a preparation method and application thereof. The photo-responsive gel electrolyte comprises an electrolyte solution and further comprises an azobenzene / polymer matrix mixture, wherein the azobenzene / polymer matrix mixture is prepared by mixing azobenzene and a polymer matrix together. According to the photo-responsive gel electrolyte disclosed by the invention, azobenzene is introduced in the polymer matrix and used to absorb light entering the electrolyte through a photo-anode, and then the azobenzene generates isomerism to drive the movement of the chain segment of the polymer, so as to promote migration of ions in the polymer matrix, further achieve the aim of improving the ionic conductivity of the electrolyte and enhance the photo-electro conversation rate of a dye-sensitized solar cell.

Description

technical field [0001] The invention relates to the field of dye-sensitized solar cells, in particular to a photoresponsive gel electrolyte and its preparation method and application. Background technique [0002] Fossil energy is non-renewable energy, which is gradually exhausted, especially in recent years, with the rapid development of emerging countries, the demand for energy has greatly increased. At the same time, the use of fossil energy produces a large amount of greenhouse gases, causing global climate change. Replacing traditional fossil energy with solar energy is the best way to solve the energy crisis and protect the environment. In recent years, solar cells have developed very rapidly and have been widely used in many fields of the national economy. However, at present, the high cost of solar cells has always been the bottleneck for the promotion and use of solar cells. Therefore, the production of low-cost, stable, and high-efficiency solar cells is the rese...

AI Technical Summary

Problems solved by technology

Although dye-sensitized solar cells based on liquid electrolytes have achieved high photoelectric conversion efficiency, liquid electrolytes are prone to leakage and volatilization, which makes it difficult to seal the assembled cells, and in long-term practical applications, the performance decreases and the service life is shortened.

All-solid-state electrolytes exhibit sustained stability in charge transport capabilities and are thus widely considered to be very promising alternatives, but suffer from low ionic conductivity.

In the current research work, some related researchers added conductive nanoparticles to the electrolyte to improve the ionic conductivity and shorten the diffusion path of the redox pair to the electrode / electrolyte interface, but this type of gel electrolyte generally It is heterogeneous, solid-liquid separation and nano-particle agglomeration will occur after long-term use

[0005] At present, there is no report on the improvement of the ionic conductivity of gel electrolytes by driving the movement of polymer molecular chains and promoting the migration of ions in the polymer network through the ultraviolet-visible light-responsive isomerization phenomenon.

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