| Abstract
| - Electrodeposited nanoporous ZnO/eosin Y hybrid films have been investigated in view of their potentialapplications in dye-sensitized solar cells and supercapacitors. Intensity-modulated photocurrent spectra weremeasured at different electrode potentials at films of different thicknesses. It was found that the results representeither the RC constant of the cell and surface recombination of photogenerated holes with electrons or thediffusion of photogenerated electrons and are dependent on the electron concentration in the ZnO, which isinfluenced by the film thickness, the electrode potential, and the light intensity. The results suggest that theporosity of the electrodeposited ZnO increases with the film thickness and the films therefore consist of twoparts, a less porous part deposited in the first few minutes that exhibits field-driven electron transport and amore porous outer part where electron transport is by diffusion. The results are supported by frequency-dependent capacitance measurements, which also show that the material is suitable for supercapacitors.
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