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Keywords:

  • integrated device;
  • capacitor;
  • dye-sensitized solar cell;
  • nanotubes;
  • thin film;
  • storage

ABSTRACT

A thin film-integrated device was constructed consisting of photovoltaic layers combined with additional layers to store charge in real time within the same device. In our design, a dye-sensitized solar cell and capacitor layers are integrated by a double-anodized titanium plate, which consists of TiO2 nanotubes grown on either side by electrochemical anodization. The combination device can act either as an independent solar cell, a capacitor, or as a solar cell/capacitor device. The results presented here illustrate the capacitive behavior of high surface area nanotubular metal oxide films, with an achieved capacitance of 140 μF cm−2. Copyright © 2012 John Wiley & Sons, Ltd.