Photoinduced surface charge distribution on TiO2.

The density of states at a Ti${\mathrm{O}}_{2}$-electrolyte interface is measured by a photoelectrochemical technique. The Schottky barrier height for various redox couples is also obtained for the surface containing this measured density. Good agreement is obtained between the band bending calculated from the interface density of states and the measured band bending as a function of the electrolyte redox Fermi potential.