| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1529853 | Materials Science and Engineering: B | 2011 | 8 Pages |
Ultrapure TiO2 nanoparticles (∼5 nm in size) were supported on “inert” BaTiO3 films by TiCl4 treatment, which was used to fabricate dye-sensitized solar cells (DSSCs). The optimized electrode, designated as BaTiO3/TiO2(4), was obtained upon four cycles of TiCl4 treatment. DSSC with BaTiO3/TiO2(4) electrode exhibits superior power conversion efficiency (PCE) compared to that with conventional anatase TiO2 (∼25 nm in size) electrode. The interfacial charge recombination kinetics was investigated by electrochemical impedance spectroscopy (EIS) and intensity-modulated photocurrent/photovoltage spectroscopy (IMPS/IMVS). In contrast to DSSC with anatase TiO2 electrode, the dramatically enhanced electron lifetime for DSSC with BaTiO3/TiO2(4) electrode could be attributed to the decrease of recombination reaction at the TiO2 photoelectrode/electrolyte interface. It is proposed that the lower interfacial charge recombination can be related to the relatively shallower trap distributions in DSSC with BaTiO3/TiO2(4) electrode.
► TiO2 nanoparticles supported on “inert” BaTiO3 films as the photoanode of the DSSC. ► Low recombination losses in DSSC with BaTiO3/TiO2(4) electrode. ► Shallow trap states distributions in DSSC with BaTiO3/TiO2(4) electrode.
