Femtosecond time-resolved x-ray photoelectron spectroscopy studies of charge transfer dynamics in novel photovoltaic systems

ORAL

Abstract

Interfacial charge transfer dynamics in dye-sensitized semiconductor films are studied by femtosecond time-resolved x-ray photoelectron spectroscopy. The experiments performed at the Linac Coherent Light Source demonstrate the potential of time-domain inner-shell photoionization studies to monitor charge migration in complex interfacial systems with femtosecond time resolution, chemical sensitivity and atomic specificity. Using this new technique, the transient oxidation state of N3 dye molecules adsorbed to nanocrystalline ZnO is monitored with unprecedented site selectivity, providing an upper bound for the interfacial electron-hole recombination rate.

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Authors

  • Oliver Gessner

    • Lawrence Berkeley National Laboratory

  • Andrey Shavorskiy

    • Lawrence Berkeley National Laboratory

  • Katrin Siefermann

    • Lawrence Berkeley National Laboratory

  • Daniel Slaughter

    • Lawrence Berkeley National Laboratory

  • Felix Sturm

    • Lawrence Berkeley National Laboratory

  • Fabian Weise

    • Lawrence Berkeley National Laboratory

  • Matthew Strader

    • Lawrence Berkeley National Laboratory

  • Hana Cho

    • Lawrence Berkeley National Laboratory

  • Ming-Fu Lin

    • Lawrence Berkeley National Laboratory

  • Travis Wright

    • Lawrence Berkeley National Laboratory

  • Jinghua Guo

    • Lawrence Berkeley National Laboratory

  • Hendrik Bluhm

    • Lawrence Berkeley National Laboratory

  • Robert Schoenlein

    • Lawrence Berkeley National Laboratory

  • Ali Belkacem

    • Lawrence Berkeley National Laboratory

  • Daniel Neumark

    • Lawrence Berkeley National Laboratory

  • Stephen Leone

    • Lawrence Berkeley National Laboratory

  • Amy Cordones

    • University of California Berkeley

  • Josh Vura-Weis

    • University of California Berkeley

  • Sheraz Gul

    • University of California Santa Cruz

  • Jin Zhang

    • University of California Santa Cruz

  • Dennis Nordlund

    • SLAC National Accelerator Laboratory

  • Hirohito Ogasawara

    • SLAC National Accelerator Laboratory

  • Anders Nilsson

    • SLAC National Accelerator Laboratory

  • Martin Beye

    • Helmholtz Zentrum Berlin

  • Nils Huse

    • Max Planck Research Department for Structural Dynamics at the University of Hamburg, CFEL