| Abstract
| - Dye sensitization of the single crystal anatase (101) surface was studied using a structurallysimilar series of dicarboxylated thiacyanine dyes that bind to the oxide surface through their carboxylategroups. An ultraviolet (UV) light treatment of the anatase (101) surfaces, immediately prior to dye adsorption,improved both the reproducibility of dye coverage and the incident photon-to-current efficiencies (IPCE)for sensitization. The UV treatment does not pit or roughen the anatase surface and results in high IPCEsof more than 1% in some cases and absorbed photon current efficiencies (APCE) from 5 to 100%. Thephotocurrent spectra showed features associated with surface-bound dye monomers and H-dimers thatcould be followed as a function of the dye surface coverage. Models for the surface structures of theadsorbed dye layers that are consistent with the measurements are presented, along with a discussion ofadsorption isotherms.
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