Radial electron collection in dye-sensitized solar cells.

Martinson, Alex B F; Elam, Jeffrey W; Liu, Jun; Pellin, Michael J; Marks, Tobin J; Hupp, Joseph T · Nano Lett · 2008

basic_science · Level V

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Abstract

We introduce a new photoelectrode architecture consisting of concentric conducting and semiconducting nanotubes for use in dye-sensitized solar cells (DSSCs). Atomic layer deposition is employed to grow indium tin oxide (ITO) within a porous template and subsequently coat the high area photoelectrode with amorphous TiO 2. Compared with control devices lacking a current collector within the pores, the new photoelectrode geometry exhibits dramatically higher current densities, an effect attributed to the radial collection of electrons.