Anode Materials For Dye-sensitized Solar Cells, Light

Energy source are limited, and development of global economy inserts extra pressure on additional energy demands. Solar energy is an attractive source because of its harmless and inexhaustibility. Dye-sensitized solar cell(DSSC) is an effective energy conversion device. In this study, dye-sensitized solar cell devices were fabricated successfully. To optimize the technological process of DSSC, photoelectrical properties of photoanode, cathode and electrolyte were discussed by electrichemical method. The results indicate that the light-to-electricity energy conversion efficiency(η) of optimized DSSC which has 5μm film, 0.17 mg/cm² platinum electrode can achieve 5.04%.TiO₂ with high degree of crystallization, large surface area and samall particle size were prepared by hydrothermal method; The results of SEM photos show that this TiO₂ has micro-nanometer composite structure. Then this kind of TiO₂ was used in DSSC whose photoelectric properties characterized by electrochemical technologies. The experimental results suggest thatηof AB-TiO₂ cell can achieve 5.45%. Besides that the transport characteristic of electrolyte and dye absorption can also benefit from this special structure. Theηof TiO₂ modified by HNO3 can reach 6.11%. There is stronger acting force between TiO₂ and dye, which increases the injection efficiency, limits"dark"current and improves the characteristics of cells.