title: Ultrafast excited state dynamics of iridium(III) complexes and their changes upon immobilisation onto titanium dioxide layers.
abstract: Time-resolved spectroscopy was applied to investigate the excited state dynamics of two heteroleptic Ir(III) complexes with the general formula [Ir(C^N)2(N^N)](+), where C^N and N^N represent different cyclometalating and diimine ligands, respectively. The excited state relaxation is influenced by the ligand substitution as well as the light polarisation. Vibrational relaxation occurs in the sub-ps timescale and interligand charge transfer results in polarisation dependent signal dynamics with a time constant of about 30 ps. Electron injection from the iridium dye to TiO2 is analysed with respect to potential applications in solar energy conversion.
authors.affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany. stefan.lochbrunner@uni-rostock.de and Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany. stefanie.tschierlei@oc.uni-stuttgart.de.
authors.forename: Stefanie
authors.initials: S
authors.lastname: Tschierlei
authors.affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany. stefan.lochbrunner@uni-rostock.de and Becker & Hickl GmbH, Nahmitzer Damm 30, 12277 Berlin, Germany.
authors.forename: Antje
authors.initials: A
authors.lastname: Neubauer
authors.affiliation: Leibniz-Institute for Catalysis at the University of Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
authors.forename: Nils
authors.initials: N
authors.lastname: Rockstroh
authors.affiliation: Institute of Organic Chemistry, University of Stuttgart, Pfaffenwaldring 55, 70569 Stuttgart, Germany. stefanie.tschierlei@oc.uni-stuttgart.de and Leibniz-Institute for Catalysis at the University of Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Karnahl
authors.affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany. stefan.lochbrunner@uni-rostock.de.
authors.forename: Patrick
authors.initials: P
authors.lastname: Schwarzbach
authors.affiliation: Leibniz-Institute for Catalysis at the University of Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
authors.forename: Henrik
authors.initials: H
authors.lastname: Junge
authors.affiliation: Leibniz-Institute for Catalysis at the University of Rostock (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany.
authors.forename: Matthias
authors.initials: M
authors.lastname: Beller
authors.affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23, 18059 Rostock, Germany. stefan.lochbrunner@uni-rostock.de.
authors.forename: Stefan
authors.initials: S
authors.lastname: Lochbrunner