Controllable Synthesis Of TiO₂Nanorod Array And Its Application In Solar Cells

TiO2,as a kind of important inorganic functional materials, have been widely applied in photoelectric conversion, photocatalyst and water photolysis due to its excellent physical and chemical properties. Among them, one dimensional TiO2nano arrays have expected to be the alternative electrode materials for solar cells according to its highly ordered structure and efficient charge carrier transport, and become a hot topic in materials science. In this thesis, the TiO2nanorod array has been prepared on the FTO substrate by a simple one step hydrothermal method. The effect of ethanol and process parameters on the morphology and crystalline of the nanorod array has been investigated. The controllable growth of TiO2nanorods array was realized and used as electrode materials in organic-inorganic composite solar cell. The photo-electrochemical properties of the cells are studied. The main results are as follows:1、In acidic conditions, orientated rutile TiO2nanorods array films have been prepared on the FTO substrate by a hydrothermal method using TBOT and HCl solution as the precursor solution.2、The effect of Hydrothermal reaction time, reaction temperature, and the concentration of ethanol in the precursor solution on morphology and crystallinity of TiO2nanorod arrays has been investigated. The controllable growths of TiO2nanorods array by hydrothermal method are obtained.3、The organic-inorganic hybrid P3HT/TiO2solar cells are assembled using TiO2nanorod arrays as an electron acceptor. The crystallization orientation, morphology, density and thickness of TiO2films have great effect on the photovoltaic performance of the FTO/TiO2/P3HT/Pt device.4、Optimizing the thickness of P-type organic P3HT layer to obtain higher cell performance.