A Comparative Photovoltaic Study of Perforated ZnO Nanotube/TiO_2 ThinFilm and ZnO Nanowire/TiO_2 Thin Film Electrode-based Dye-sensitizedSolar Cells

摘要

We demonstrate for the first time novel perforated ZnO nanotube /TiO_2 electrode-based dye-sensitized solar cells (DSSCs). From the current-voltage characteristics, the open-circuit voltage hoc, short-circuit current density Jsc, and the fill factor FF were determined to be ～0.84 V,mA/cm~2, and 0.60, respectively. We obtained a power conversion efficiency, η, of ～2.4% under air mass 1.5 global solar conditions. This represented an improvement of approximately 2 times as compared to ZnO nanowire/TiO_2 electrode-based DSSCs. The superior photovoltaic performance and J_(SC) value are attributed to high dye loading and high light harvesting via the high surface area of the ZnO nanotubes.