Charge Carrier Dynamics of Photoexcited Co3O4 in Methanol: Extending High Harmonic Transient Absorption Spectroscopy to Liquid Environments
Journal
NANO Letters
Journal Volume
14
Journal Issue
10
Pages
5883-5890
Date Issued
2014
Author(s)
L. R. Baker
S. T. Kelly
J. M. Lucas
J. Vura-Weis
M. K. Gilles
A. P. Alivisatos
S. R. Leone
Abstract
Charge carrier dynamics in Co3O4 thin films are observed using high harmonic generation transient absorption spectroscopy at the Co M2,3 edge. Results reveal that photoexcited Co3O4 decays 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 Co3O4 may be the result of hole transfer from Co3O4 followed by carrier recombination at the Co3O4-methanol interface.
SDGs
Type
journal article