title: Dye-injected electron trapping in TiO2 determined by broadband transient infrared spectroscopy.
abstract: We report the dynamics of electrons injected into TiO2 due to the excitation of Ru-N719 dye at 532 nm. The synchrotron based broadband transient mid-IR spectroscopy revealed that the injected electrons are quickly confined to a trap state with an average energy of ca. 240 meV below the conduction band. The average energy of the trapping states did not change with the increase of the delay time, suggesting a singular electronic identity of the trap states.
authors.affiliation: Paul Scherrer Institut, 5232 Villigen PSI, Switzerland.
authors.forename: Peter
authors.initials: P
authors.lastname: Friedli
authors.forename: Hans
authors.initials: H
authors.lastname: Sigg
authors.forename: Jacinto
authors.initials: J
authors.lastname: Sá