A simple technique was developed to fabricate a large-area
TiO2
electrode layer using electrospun nanorods for dye-sensitized solar
cells (DSSCs). Using this technique, we assembled DSSCs of area
∼1 cm2 consisting of a thin
TiO2 nanoparticle layer
and a thick TiO2 nanorod
layer as electrode. The TiO2
nanorods were obtained by mechanically grinding electrospun
TiO2
nanofibers. A titania sol was first spin-coated on a conductive glass plate and a
TiO2
nanorod layer was next spray dried on it to fabricate
TiO2
nanoparticle/nanorod layers. These layers were subsequently sintered. The
best-performing DSSC evaluated under AM1.5G (1 sun) condition gave current density
∼13.6 mA cm−2, open circuit
voltage ∼0.8 V, fill
factor ∼51% and energy
conversion efficiency ∼5.8%.
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