Quasi solid electrolyte for dye sensitization solar battery and preparation method thereof

Abstract

The invention discloses a quasi solid electrolyte for a dye sensitization solar cell. The compositions by weight percentage of the electrolyte are: 5-20 percent of alpha- cyanoacrylate, 0.1-1 percent of a crosslinking agent, 10-20 percent of iodine salt, 0.5-3 percent of iodine, 1-10 percent of a modifier, 40-60 percent of a plasticizer, and 10-20 percent of an organic solvent. A preparation method comprises the following steps of: stirring and mixing the compositions evenly according to the proportion to generate homogeneous phase liquid; then dripping the homogeneous phase liquid onto a TiO2 film electrode for absorbing dye; and thermosetting and drying evaporating the organic solvent to obtain the quasi solid electrolyte for the dye sensitization solar cell. The quasi solid electrolyte is characterized by low cost, simple preparation process, a high curing rate, easy realization of industrialized production, high ionic conductivity, good thermal stability and mechanical properties, etc.

Description

technical field [0001] The invention relates to a quasi-solid electrolyte and a preparation method thereof, in particular to a quasi-solid electrolyte for dye-sensitized solar cells and a preparation method thereof. Background technique [0002] At present, monocrystalline silicon cells dominate the solar cell market. As the latest achievement in the development of solar cells in recent years, dye-sensitized energy cells (DSSC) show a new development direction of solar cells. 1991 Switzerland et al. using bipyridyl ruthenium complex dyes and nanoporous TiO 2 Dye-sensitized solar cells are prepared from thin films. This type of solar cells is mainly composed of transparent conductive glass, nano-TiO 2 It is composed of porous semiconductor film, dye photosensitizer, electrolyte and counter electrode. Compared with the expensive production cost and complicated preparation process of silicon solar cells that currently dominate the market, the most attractive features of thi...

AI Technical Summary

Problems solved by technology

However, due to the combination of organic hole transport materials and nano-TiO 2 The contact of the porous film is not good and the hole transport rate is not high, and its energy conversion efficiency is less than 4%; while the efficiency of inorganic p-type semiconductor materials is mostly less than 5% due to its poor stability.

Quasi-solid electrolytes for dye-sensitized solar cells are mainly polymer-type gel electrolytes, mostly using polyethylene oxide, polyacrylonitrile, polyvinylidene fluoride copolymerized perfluoropropylene, etc. Agents, solvents, etc. constitute the electrolyte. Since there is no cross-linked polymer network structure, the amount of "active components" retained in the electrolyte gradually decreases over time, resulting in certain limitations in photoelectric conversion efficiency and stability; Adopt the monomer containing multifunctional double bond, add initiator to form the cross-linked structure of solid, although performance improves greatly (up to 7-8%, see literature: R.Komiya, etc.J.Photochem.Photobiol.A: Chem.164 (2004) 123), but face the problem of other two aspects, one is that the synthetic steps of this functional monomer are many, and product is difficult for purification; Its two is that its sealing process has not been improved; CN1468909 adopts polyisocyanate as The polyisocyanate is toxic and unfavorable to environmental protection. At the same time, the comb-shaped polysiloxane is used as the skeleton material to prepare the gel electrolyte, but the synthesis process of the polysiloxane skeleton material of the comb is complicated, the cost is high, and the time is long.

Images