Abstract
The electric field induced dipole model which is useful for interpreting the mechanism of photogenerated charge transfer in nano-TiO 2 has been introduced using photovoltage electric field scanning technique. Based on above model, we suppose that diffusion mechanism controls the photogenerated charge transfer in nano-TiO 2. Also, we have studied the behavior of charge transfer in nano-TiO 2 under external electric field and found that the photogenerated charge transfer is controlled by different transfer mechanisms under different applied external electric field.
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