Research On DSSC Based On Graphene-Ionic Liquid Composite Electrolytes

Dye-sensitized solar cells(DSSCs)are an inexpensive,technically simple and efficient photovoltaic device,Typical DSSC are mainly compose of the photoanode,the electrode,and electrolyte.In order to explore the effect of electrolytes on the photoelectric property of DSSC.In this paper,through electrochemical characterization,Effect of Optimized The Binary Ionic(RTIL)Liquid Electrolytes on Photoelectric Properties of Dye-sensitized Solar Cells.meanwhile,The effect of graphene on the stability of DSSC was explored by adding graphene sheets to the optimized RTIL electrolyte.The main research work are as follows :(1)Optimum preparation of the binary ionic liquid dye sensitized solar cells under laboratory conditions,In-depth study the working principle of DSSC and device characterization and data processing methods.To provide a theoretical and practical basis for the comprehensive study of dye-sensitized solar cells.(2)The optimized RTIL electrolytes and devices were characterized by electrochemical impedance spectroscopy,cyclic voltammetry and incident monochromatic photoelectric conversion efficiency analyze the working mechanism leading to the improvement of photoelectric properties of devices,Research indicates the photoelectric performance enhancement was mainly contributed to the improvement of short circuit current which is caused by the reduction of overall internal resistance of the devices.Thereby improving the photoelectric conversion efficiency of the DSSC.(3)The different volume ratio of graphene,In the optimized RTIL electrolyte with different mass fraction of graphene nanoflakes blend to preparation DSSC.The effects of graphene on the optoelectronic properties and the stability of the optimized RTIL-DSSC were investigated by photoelectric properties and stability tests.The research work shows that due to the interaction between graphene and RTIL leading to the formation of a self-organized network,the device can maintain long-term stability and durability.To solve the stability of dye-sensitized solar cells provides a practical and effective way.