The Dye-Sensitized Solar Cell Electranode Preparation By Electrostatic Self-Assembly Multiayer

Energy crisis is the most important issue that hinder the economic development of the world.Solar energy source,which is a clean, cheap and inexhaustible energy, become one of the promising materials. Dye-sensitized solar cell was widely concerned by scientists from various countries because of simple process low cost and stable performance. Porous nano-TiO2 thin film is one of the most important parts of DSSC cell systemIn this paper, nano-crystalline powders were prepared by hydrothermal method, and made into gel, the gel were adsorbed on the colloidal FTO conductive glass by electrostatic self-assembly multlayer (ESAM),then were made into anode of nano-crystalline dye-sensitized solar cell. The phase composition and microstructure of TiO2 powders and Porous nano-TiO2 thin film were obversed by SEM, XRD, XPS.The influences of pH of precursor, reaction temperature and hydrothermal time on the phase, particle size and morphology of nano-TiO2 powder were studied, research suggests that anatase nano-TiO2 powder which average particle size is 7.1nm were produced when pH of precursor was 10.5, temperature and time of hydrothermal synthesis were 120℃and 5h respectively.Solar cell was assembled that take porous TiO2 thin film as anode and carbon-modified conductive glass as cathode, I/I3- solution as electrolyte, and photoelectric performance were tested. Anode of DSSC battery were Prepared by Electrostatic Self-Assembly Multayer. The effect of thickness of thin film on the phase, morphology and optical properties of the battery were studied, results show that DSSC solar cells work best when there were 7-layer TiO2 thin film, while the photoelectric conversion rate of 3.53%.