Construction And Photoelectrochemical Property Of Dye-sensitized Nanocrystalline Film

In this thesis, one-dimension ZnO and TiO₂/ZnO nanocrystalline films were prepared through a solution-based chemical route at low temperature. While used as the photoanode, the correlations between the structure of the nanocrystalline films and the photoelectrochemical properties of the resulted solar cell were studied. Also, a new gaseous adsorption route was employed to prepare eosin-sensitized TiO₂ nanocrystalline film and its solar energy conversion properties were studied. These included:1. Morphology controllable one-dimension ZnO nanocrystalline thin films were prepared using a solution-based chemical route at low temperature. The effect reaction conditions such as temperature, concentration and solution pH etc on the morphologies were studied. Moreover, aligned TiO₂/ZnO composite films were fabricated via a thermal decomposition of alkoxide or doctor-blade method.2. By using the ZnO or TiO₂/ZnO films, dye-sensitized solar cells were constructed, and their photoelectrochemical properties were investigated. It is found that the composite film of TiO₂/ZnO is the best one in constructing solar cell with higher solar energy conversion efficiency.3. The factors that affect the properties of the Eosin-sensitized solar cells were investigated. The best solar energy conversion of the resulted solar cell was found to be 1.02%, which is much higher than the eosin-sensitized solar cell prepared via the wide used soaking route.