Mesoporous nitrogen-doped Tio2 sphere applied for quasi-solid-state dye-sensitized solar cell

Abstract

A mesoscopic nitrogen-doped Tio2 sphere has been developed for a quasi-solid-state dye-sensitized solar cell [DSSC]. Compared with the undoped Tio2 sphere, the quasi-solid-state DSSC based on the nitrogen-doped Tio2 sphere shows more excellent photovoltaic performance. The photoelectrochemistry of electrodes based on nitrogen-doped and undoped Tio2 spheres was characterized with Mott-Schottky analysis, intensity modulated photocurrent spectroscopy, and electrochemical impedance spectroscopy, which indicated that both the quasi- Fermi level and the charge transport of the photoelectrode were improved after being doped with nitrogen. As a result, a photoelectric conversion efficiency of 6.01% was obtained for the quasi-solid-state DSSC. © 2011 Xiang et al.