Speaker
Description
For achieving the high quality of titanium dioxide (TiO$_2$) nanorods, herein, we present a synthesis of rutile TiO2 nanorods on a transparent conductive fluorine-doped tin oxide (FTO) glass substrate with seed layer by a two-step method. Anatase TiO$_2$ thin films were first precoated by spin coating and annealing, followed by the growth of rutile TiO$_2$ nanorods with a hydrothermal method. The crystallographic nanostructures and properties of the nanorods were investigated. XRD results demonstrate that seed layer was tetragonal anatase TiO$_2$ structure while nanorods had tetragonal rutile TiO$_2$ structure. Since the hydrothermal technique was conducted in medium acid, structure of nanorods was induced to form in rutile phase. The major characteristic orientation of nanorods on the seed layers was [002] and minor in (101) planes. FE-SEM results show that seed layer enhances the process to achieve vertical-aligned orientation of the TiO$_2$ nanorods, which contribute to develop electron transport rate and could pay an important role in electron transport layer in high-performance Perovskite solar cell.
