Fast charge transport in the TiO2 network is essential for effective charge collection, particularly in solid state cells where recombination is very fast.  In order to increase the electron mobility, substantial efforts have been focused on developing one dimensional (1-D) TiO2 (polycrystalline nanotube and single-crystalline nanowire) electrode materials for solar cells application. However, their surface area is much smaller than that of NP films, which will negatively impact the devices' overall performance. We report a facial seedless approach to fabricate orientated assembled 3D branched nanowire arrays on transparent fluorine doped tin oxide (FTO) glass substrate. The nano-branches grow epitaxially from specific crystal planes of the primary NW arrays. The as-prepared 3D B-NW arrays architecture offers high surface area, rapid charge transport property (comparable to 1D single crystal NW), and significantly improved photovoltaic device performance. orientation, to significantly improve the electrical transport properties of other oxide materials that currently have limited utility in solar cell and related applications because of their low carrier mobility.

Oriented assembled TiO<sub>2</sub> hierarchical nanowire arrays with a fast electrontransport property

247th National Meeting (2014)

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Oriented assembled TiO2 hierarchical nanowire arrays with a fast electrontransport property

Oriented assembled TiO₂ hierarchical nanowire arrays with a fast electrontransport property