In this paper, effects of ethylene glycol (EG) and indium tin oxide (ITO) solution on the morphology, porosity, and roughness of TiO 2 film prepared by sol-gel process were investigated and discussed. Initially, the addition of EG were used to control the viscosity of the solution and it was found to increase the pore size of TiO 2 film. The various TiO 2 films were investigated and characterized by scanning electron microscopy (SEM) and atomic force microscopy (AFM) and then assembled to dye-sensitized solar cell (DSSC) to measure the photoelectric conversion efficiency. The optimum efficiencies of 1.32% with J sc and V oc of 2.99 mA/cm 2 and 0.80 V, respectively, were obtained by the TiO 2 film prepared from a solution containing 20 wt% EG.
In this study, we report the deposition of crack-free transparent PZT films (up to ∼859 nm) by metallo-organic decomposition (MOD) process on amorphous silica substrate. Effect of SrTiO 3 (STO) buffer layer on the growth behavior of PZT thin films deposited on SiO 2 -coated silicon substrates was systematically studied. Perovskite phase, which cannot be formed directly on SiO 2 /Si substrates, has been obtained when a thin STO film (∼150 nm) was used as buffer layer. A SIMS examination indicates that the upward diffusion of Si-species into PZT layer is minimal, although downward diffusion of Pb-species into the SiO 2 layer is still observable.
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