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TiO_2 Nanotube Array as Efficient Transparent Photoanode in Dye-Sensitized Solar Cell with High Electron Lifetime

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Lamberti A., Sacco A., Hidalgo D., Bianco S., Manfredi D., Quaglio M., Tresso E., Pirri C.

Acta Physica Polonica A

2013

vol. 123

issue 2

376-379

In the present work, the fabrication and characterization of non-curling, free-standing TiO_2 nanotube membranes and their integration in front-side illuminated dye-sensitized solar cells are reported. Vertically oriented TiO_2 nanotube arrays were fabricated by anodic oxidation of a titanium foil. Nanotube membranes were detached from the metallic foil, transferred and bonded on transparent fluorine-doped tin oxide/glass substrates employing a TiO_2 sol as a binder. Crystalline phase and morphology of the film were investigated, evidencing the formation of a highly ordered 1D nanotubes carpet, with a pure anatase crystalline structure. TiO_2 nanotube-based DSCs were fabricated using reversible microfluidic architecture. The cell performances were studied by I-V electrical characterization, incident-photon-to-electron conversion efficiency, electrochemical impedance spectroscopy and open circuit voltage decay measurements, showing an increase in electron lifetime compared to nanoparticle-based dye-sensitized solar cells.

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1 Acta Physica Polonica A

1 2013

1 Bianco S.

1 Hidalgo D.

1 Lamberti A.

1 Manfredi D.

1 Pirri C.

1 Quaglio M.

1 Sacco A.

1 Tresso E.

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TiO_2 Nanotube Array as Efficient Transparent Photoanode in Dye-Sensitized Solar Cell with High Electron Lifetime