Synthesis of TiO_2 submicro-rings and their application in dye-sensitized solar cell

摘要

In this paper, novel TiO_2 submicro-rings were synthesized via potentiostatic anodization of titanium powder coated on transparent conducting oxide glass. The TiO_2 submicro-rings film was characterized by SEM, XPS and 3D optical profiling. Accordingly, a possible growth mechanism of submicro-rings was discussed. The TiO_2 submicro-rings based dye-sensitized solar cell (DSSC) with the film thickness of ca. 3.1 μrn was assembled and a conversion efficiency of 1.36% was achieved under AM 1.5 illumination. The photoelectron transport properties of TiO_2 submicro-rings based DSSC were also discussed according to the electron impedance spectroscopy.