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Charge carrier dynamics of photoexcited Co3O4in methanol: Extending high harmonic transient absorption spectroscopy to liquid environments

  • Author(s): Baker, LR
  • Jiang, CM
  • Kelly, ST
  • Lucas, JM
  • Vura-Weis, J
  • Gilles, MK
  • Alivisatos, AP
  • Leone, SR
  • et al.

Published Web Location

https://doi.org/10.1021/nl502817a
Abstract

© 2014 American Chemical Society. Charge carrier dynamics in Co3O4thin films are observed using high harmonic generation transient absorption spectroscopy at the Co M2,3edge. Results reveal that photoexcited Co3O4decays to the ground state in 600 ± 40 ps in liquid methanol compared to 1.9 ± 0.3 ns in vacuum. Kinetic analysis suggests that surface-mediated relaxation of photoexcited Co3O4may be the result of hole transfer from Co3O4followed by carrier recombination at the Co3O4-methanol interface.

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