Sa, JacintoFriedli, PeterGeiger, RichardLerch, PhilippeRittmann-Frank, Mercedes H.Milne, Christopher J.Szlachetko, JakubSantomauro, Fabio G.Bokhoven, VanJeroen, A.Chergui, MajedRossi, Michel J.Sigg, Hans2013-04-152013-04-152013-04-15201310.1039/c3an36595fhttps://infoscience.epfl.ch/handle/20.500.14299/91502WOS:000315598500007The dynamics of TiO2 conduction band electrons were followed with a novel broadband synchrotron-based transient mid-IR spectroscopy setup. The lifetime of conduction band electrons was found to be dependent on the injection method used. Direct band gap excitation results in a lifetime of 2.5 ns, whereas indirect excitation at 532 nm via Ru-N719 dye followed by injection from the dye into TiO2 results in a lifetime of 5.9 ns.text::journal::journal article::research article