A solar cell comprising at least one electrode having a plurality of
fingers. Specifically, an electrode comprising a planar surface and a
plurality of fingers extending therefrom is provided. A second electrode
is provided. The second electrode comprises a planar surface and may
comprise a plurality of fingers which are interdigitated with the fingers
of the first electrode. The second electrode provides a catalyst material
for the electron transfer to an oxidant during the photovoltaic process.
A semiconductor material is disposed between the electrodes. The
semiconductor material is saturated with dye and injected with an
electrolyte solution. The fingers are arranged to provide a reduced
migration path for the oxidant through the electrolyte and for the
electrons through the semiconductor material when exposed to incident
light.