An increasing energy demand and environmental pollution create a pressing need for clean and sustainable energy solutions. TiO 2 semiconductor material is expected to play an important role in helping solve the energy crisis through effective utilization of solar energy based on photovoltaic devices. Dye-sensitized solar cells (DSSCs) are potentially lower cost alternative to inorganic silicon-based photovoltaic cells. In this study, we report on the fabrication of DSSCs from anodic TiO 2 nanotubes (NT) powder, produced by rapid breakdown potentiostatic anodization of Ti foil in 0.1 M HClO 4 electrolyte, as photoanode. TiO 2 NT powders with a typical NT outer diameter of approximately 40 nm, wall thickness of approximately 8-15 nm, and length of about 20-25 lm, have been synthesized. The counter electrode was made by electrodeposition of Pt from an aqueous solution of 5 mM H 2PtCl 6 onto fluorinedoped tin oxide (FTO) glass substrate. The above frontside illuminated DSSCs were compared with back-side illuminated DSSCs fabricated from anodic TiO 2 NTs that were grown on the top of Ti foil as photoanode. The highest cell efficiency was 3.54% under 100 mW/cm 2 light intensity (1 sun AM 1.5G light, Jsc = 14.3 mA/cm 2, Voc = 0.544 V, FF = 0.455). To the best of our knowledge, this is the first report on the fabrication of DSSC from anodic TiO 2 NTs powder. The TiO 2/FTO photoanodes were characterized by FE-SEM, XRD, and UV-Visible spectroscopy. The catalytic properties of Pt/FTO counter electrodes have been examined by cyclic voltammetry.
ASJC Scopus subject areas
- 化学 (全般)