Abstract
We study quenching mechanism of long-lived photoexcitations and interfacial electronic structures of photo-oxidized MEH-PPV on gold using two-photon photoemission spectroscopy, in comparison with unannealed and annealed films. The work function of 3.95 eV is not changed by photo-oxidation while the yield and kinetics of photoexcitations are significantly influenced by photo-oxidation. Upon photo-oxidation, we observed narrowing of photoemission distribution at higher photon energy, attributed to lowering of an intermediate state level and/or quenching of the photoexcitation state. The photoemission yield at higher-lying photoexcitations quenches dramatically, understood by charge transfer toward defects, consistent with first-order kinetics – increase in power law slope.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
