Photoelectrochemical Properties Of Photo-anode Used In Dye Sensitized Solar Cells

As a type of new energy source, the photovoltaic cell is of a great interest around the world. The solar cells are as one of the most important ways to use solar energy. In the solar cells, as a potential alternative to solar cell based on semiconductor, dye-snsitized solar cell is becoming one of the most important renewable energy sources and has drawn intensive attention recently due to their good application prospects, and the trend of this domain is to improve the photoelectric conversion efficiency of the solar cells. In this paper, we mainly focus on how to improve the light capture efficiency and electron transfer rate to increase performance of the solar cells. The major contents of this thesis are as follows:1. The photo-anode of TiO2 nanocrystalline film were prepared,device assembly and testingTiO2 nanoparticles films with different thickness have prepared through scratch method which is used to be familiar with standard device fabrication and testing methods.2. TiO2 nanorods were doped into TiO2 nanoparticles film used as photo-anodeTiO2 rutile nanorods(RNR) and TiO2 anatase nanorods(ANR) wre synthesized via one-step and two-step hydrothermal method. By adjusting the doping ratio of nanoparticles(NP) and nanorods(NR) in TiO2 nanocrystalline film used as photo-anode in dye-sensitized solar cells to increase light harvesting efficiency and electron transfer rate, the N719 DSSCs were constructed and compared. The best light-to-electricity conversion efficiency 7.3% was obtained from a double-layered photoanode (ANP/(ANR+ANP)) cell, which is 19.8% higher than the traditional single-layered ANP cell (6.1%).3. TiO2 nanotube arrays were prepared by anodization of Ti foil.TiO2 nanotube arrays were prepared by optimized anodization of Ti foil, and TiO2 nanotube arrays as photo-anode. And the photovoltaic performance of solar cells using platinum or carbon nanotubes film as counter electrodes in liquid dye-sensitized solar cells, solid-state dye-sensitized solar cells and polymer solar cells were compared, respectively. Final, flexible solar cells were prepared by anodization of Ti wire as flexible photo-anode, and the use of carbon nanotubes film as flexible counter electrodes.