Preparation Of TiO₂Coating Electrode On Dye-sensiitzed Solar Cell In Low Temperature

As a new type of the solar cell, Dye-sensitized solar cell is attracted extensive attentionfrom scholars at home and abroad because of its simple fabrication procedure, low cost andclean energy. Its photoelectric conversion efficiency reaches above10%, and its life reachmore than20years, but its production cost of silicon solar cells are only1/5-1/10, wouldlikely be the dominant future solar cells. Use of the printing slurry preparation ofdye-sensitized solar cells coating electrode is one of the key technologies for industrialproduction. Therefore, how to print nano-TiO2slurry has become a research focus In thispaper, preparation of printing slurry on dye-sensitized solar cell and properties of the coatinghave been studied.In this paper, P25(TiO2) printing slurries were prepared by mixing three solvents(1-Propanol, Tetrahydrofuran and Mathyl methacrylate) with P25powder, respectively. Andthe TiO2printing slurry with different viscosity was prepared by hydrothermal method underdifferent temperatures. Dispersity of the P25printing slurries was investigated by microscope,phase constitution of the TiO2printing slurries which was prepared by hydrothermal methodwas investigated by X-ray diffraction testing instrument, properties of the TiO2printingslurries such as viscosity, rheology, wetting property and adhesion were respectivelyinvestigated by rheology testing instrument and contact angles testing instrument, and theresidual volume of the organic compounds and group information was investigated by fouriertransform infrared spectrometer. Ultimately determined the best sizing formula.The results show that the P25printing slurry prepared by1-propanol exhibits betterperformances in dispersity, viscosity and adhesion under the condition of mole ration(P25):n(1-propanol)=1:10. And the TiO2printing slurry prepared by1-propanol athydrothermal temperature180°C exhibits better performances in rheology, wetting propertyand adhesion under the condition of mole ration n(TiO2):n(1-propanol)=1:8. With the printingslurries, screen printing technique was utilized to prepare TiO2electrode on flexible ITO/PETsubstrate and the photoelectricity performance of the TiO2electrode was investigated with the solar cells testing instruments (solar simulator and electrochemical workstation).