Dye-sensitized solar cells with modified TiO2 surface chemical states: The role of Ti3+
- 7 November 2011
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 99 (19), 192104
- https://doi.org/10.1063/1.3660711
Abstract
Dye-sensitized solar cells (DSSCs) with TiO2 electrodes, which were modified to have different surface chemical states, were fabricated. The DSSCs had an ultra-flat TiO2 electrode, on which only a mono-layer dye was attached. The cell I-V measurement showed that Ti3+ ion had a dramatic effect on cell performance. The efficiency of a DSSC was shown to have a strong correlation with the concentration of the Ti3+ surface state, it decreased almost linearly with increased Ti3+ concentration. The oxygen vacancy-Ti3+ defect served as electron recombination center and decreased both the open-circuit voltage and the fill factor.Keywords
This publication has 20 references indexed in Scilit:
- Plasmonics for improved photovoltaic devicesNature Materials, 2010
- Interpretation of diffusion coefficients in nanostructured materials from random walk numerical simulationPhysical Chemistry Chemical Physics, 2008
- Advances in Liquid‐Electrolyte and Solid‐State Dye‐Sensitized Solar CellsAdvanced Materials, 2007
- Diffusion Properties of Dye Molecules in Nanoporous TiO2 NetworksThe Journal of Physical Chemistry A, 2005
- Surface plasmon subwavelength opticsNature, 2003
- Dye-Sensitized Core−Shell Nanocrystals: Improved Efficiency of Mesoporous Tin Oxide Electrodes Coated with a Thin Layer of an Insulating OxideChemistry of Materials, 2002
- TiO2-Coated Nanoporous SnO2 Electrodes for Dye-Sensitized Solar CellsLangmuir, 2002
- Influence of oxygen and water related surface defects on the dye sensitized TiO2 solar cellSolar Energy Materials and Solar Cells, 1999
- Light-Induced Redox Reactions in Nanocrystalline SystemsChemical Reviews, 1995
- A low-cost, high-efficiency solar cell based on dye-sensitized colloidal TiO2 filmsNature, 1991