Abstract
The porous nanotubes were successfully fabricated by coating a porous layer on the walls of the TiO 2 nanotubes. This method was proved available for effectively increasing the specific surface area of the nanotubes. The DSSCs based on such porous nanotubes has a higher conversion efficiency than that of the DSSCs using common TiO 2 nanotubes. This could be explained by the enhanced loading of dye molecules on porous TiO 2 nanotubes, which resulted in the improvement of short-circuit current. The light to electric energy conversion efficiency of the DSSCs applying porous TiO 2 nanotubes is about 1.79% nearly two times higher than that of the DSSCs based on normal TiO 2 nanotubes.
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