Hierarchical TiO2 photoanode for dye-sensitized solar cells.
Hierarchical or one-dimensional architectures are among the most exciting developments in material science these recent years. We present a nanostructured TiO(2) assembly combining these two concepts and resembling a forest composed of individual, high aspect-ratio, treelike nanostructures. We propose to use these structures for the photoanode in dye-sensitized solar cells, and we achieved 4.9% conversion efficiency in combination with C101 dye. We demonstrate this morphology beneficial to hamper the electron recombination and also mass transport control in the mesopores when solvent-free ionic liquid electrolyte is used.
Sauvage
F
F
Institut des Sciences et Ingenieurie Chimiques, Ecole Polytechnique Federale de Lausanne (EPFL), Lausanne, Switzerland.
Di Fonzo
F
F
Li Bassi
A
A
Casari
C S
CS
Russo
V
V
Divitini
G
G
Ducati
C
C
Bottani
C E
CE
Comte
P
P
Graetzel
M
M