TiO$lt;inf$gt;2$lt;/inf$gt; Nanowires Infiltrated with Graphene-decorated Mesoporous TiO$lt;inf$gt;2$lt;/inf$gt; for Enhanced Dye-sensitized Solar Cell

Novel hybrid dye-sensitized solar cells (DSSCs) were fabricated and characterized, employing a composite photoanode of TiO 2 nanowires infiltrated with graphene-decorated mesoporous TiO 2 . Combining the merits of the high dye loading of mesoporous TiO 2 , high light harvesting capability with the carrier transport of TiO 2 nanowires and the high electron collection efficiency from graphene, the overall performance of such photoanode was significantly improved. The obtained DSSCs showed a power conversion efficiency of up to 7.58%, about 1.5 times higher than the pristine TiO 2 nanowires, which was quite competitive compared with the similar 1D structured photoanode of DSSCs.