title: Electron trapping on Fe(3+) sites in photodoped ZnO colloidal nanocrystals.
abstract: The effects of photodoping on the electronic structure of Fe(3+)-doped ZnO colloidal nanocrystals are presented. We observe disappearance of the spectroscopic signatures attributed to both substitutional Fe(3+) and interstitial Fe(3+) in the ZnO host as a function of photodoping time, which precede the appearance of the well-known localized surface plasmon resonance from conduction band electrons in ZnO nanocrystals. These results suggest that the oxidation state of Fe(3+) defects can be reversibly switched in ZnO nanocrystals.
authors.affiliation: Department of Chemistry, University of Massachusetts, 122 Lederle GRC, 710 N Pleasant St, Amherst, MA 01003, USA. kittilstved@chem.umass.edu.
authors.forename: Dongming
authors.initials: D
authors.lastname: Zhou
authors.affiliation: Department of Chemistry, University of Massachusetts, 122 Lederle GRC, 710 N Pleasant St, Amherst, MA 01003, USA. kittilstved@chem.umass.edu.
authors.forename: Kevin R
authors.initials: KR
authors.lastname: Kittilstved