The Preparation Of One Dimensional Photo-anode Film And The Applications Of Plasmon Effect In Dye Sensitized Solar Cells

In the dye-sensitized solar cell,the photo anode material can adsorb dye molecules,transport photo-generated electrons to the conductive layer then diffuse to the external circuit.Thus prepared photo anode thin film is one of the core parts in dye-sensitized solar cell,therefore,study and preparation of the photo anode thin films with high optical properties is very important for the application and theoretical significance of the solar cells.The photo anode thin films applied for the dye-sensitized solar cell mainly using nano-Zn O,TiO₂,SnO₂,SrTiO₃ photo anode oxide.But,the highest photoelectric conversion efficiency of dye-sensitized solar cell is still from nanometer TiO₂ material.Conventional anode film mainly fabricated by the larger surface area TiO₂ particles.However,electron scattering and electron capture between the grain boundaries of the nanoparticles will impact the performance of the DSSC.Therefore,vertical ordered one-dimensional structure with efficient electronic transmission channel will effectively reduce the grain boundary and surface states in the films.In this thesis,TiO₂ photo anode film with rod-like structure synthesized by the hydrothermal method on the FTO conductive glass surface and applied to a solar cell.Then under the different conditions of environment with acid etching stick film obtained tubular membrane.We found that in 120 ? environment acid etching 5 hours can get stable film tube array.The TiO₂ photo anode structure has more open space and that will increase the photons scattering and photons route,increase the light absorption effect;In addition,its orderly vertical structure is good for electron transport,reducing interface recombination,sufficiently dispersing the electrolyte,then form a three-dimensional interface between the photo anode and the electrolyte which is good for the absorption and also effective photochemical reactions.On this basis,by optimizing its structure,achieve high performance anodic films with better quality,further improve the photocurrent and power conversion efficiency of the cell.We use redox reaction method to synthesize metal nanoparticles and doping them into the nanotube film,we intend to take advantage of the plasmon property to increase the range of spectrum of anodic film,to improve the photoelectric conversion efficiency of the solar cells.At the same time we introduced the modified layer of P25 nanoparticles on the 1D thin films,further improving the morphology of the film,and then improve the performance of the dye-sensitized solar cells.Finally,characterize and test the performance of the prepared films and cells,and provide theoretical guidance and technical support for obtaining a higher energy conversion efficiency of DSSC,analysis the structure of TiO₂ nano-films and the performance of DSSC.