Quasi-solid electrolyte for dye-sensitized solar cell

Abstract

The invention provides a quasi-solid electrolyte for a dye-sensitized solar cell. The quasi-solid electrolyte for the dye-sensitized solar cell is prepared from the following components in parts by weight: 40-60 parts of dibutyl benzyltriazine ionic crystal, 20-30 parts of pyridine ionic liquid, 4-9 parts of elemental iodine, 3-8 parts of an additive and 2-5 parts of an organic salt-modified polypyrrole tube, wherein the additive is one or more of methylbenzimidazole (MBI), butyl-benzimidazole (NBB) and tert-butylpyridine (TBP); and the pyridine ionic liquid is selected from one or more of N-ethylpyridine tetrafluoroborate, N-butyl-pyridine hexafluorophosphate, N-butylpyridinium hexafluorophosphate and N-heptane pyridine hexafluorophosphate. The quasi-solid electrolyte provided by the invention is higher in conductivity, better in stability and easier to package in comparison with the quasi-solid electrolyte in the prior art, and does not contain an organic solvent, so that the security is better, and the photoelectric conversion efficiency of the dye-sensitized solar cell is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of new materials and new energy, and relates to a dye-sensitized solar cell assembly, in particular to a quasi-solid electrolyte for a dye-sensitized solar cell. Background technique [0002] In recent years, with the development of the economy and the acceleration of the global industrial process, energy issues and environmental issues have become increasingly prominent and have become two important factors restricting the development of today's society. The attention of clean new energy devices is increasing. As one of many new energy devices, dye-sensitized solar cells have become a research hotspot in recent years due to their advantages of high efficiency and low cost. [0003] Electrolyte is one of the key components of dye-sensitized solar cells, which is responsible for the reduction of light-excited dyes, and its performance directly affects the photoelectric conversion efficiency, working stabilit...

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Problems solved by technology

[0004] Chinese invention patent CN 101205283A discloses a gel-type electrolyte and its preparation method. The electrolyte is composed of elemental iodine, polymethacrylate ionic liquid, polyacrylonitrile, ethylene carbonate, propylene carbonate and SiO 2 Composition; the preparation method of the electrolyte is simple, the ionic conductivity is high, and the introduction of the polymer makes the electrolyte form a gel to a certain extent, which inhibits the leakage of organic solvents such as ethylene carbonate and propylene carbonate, but ethylene carbonate is still unavoidable. , Volatilization of propylene carbonate, resulting in a decline in battery performance

[0005] Chinese invention patent CN 102592832A discloses a solid electrolyte for solar cells, the main component of which is a monoimidazole-type ionic crystal with a low conductivity of about 1×10 -6 S / cm, which seriously affects the photoelectric conversion efficiency of dye-sensitized solar cells prepared with this electrolyte, which only reaches 4.45%.

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