title: Charge transport mechanism in lead oxide revealed by CELIV technique.
abstract: Although polycrystalline lead oxide (PbO) belongs to the most promising photoconductors for optoelectronic and large area detectors applications, the charge transport mechanism in this material still remains unclear. Combining the conventional time-of-flight and the photo-generated charge extraction by linear increasing voltage (photo-CELIV) techniques, we investigate the transport of holes which are shown to be the faster carriers in poly-PbO. Experimentally measured temperature and electric field dependences of the hole mobility suggest a highly dispersive transport. In order to analyze the transport features quantitatively, the theory of the photo-CELIV is extended to account for the dispersive nature of charge transport. While in other materials with dispersive transport the amount of dispersion usually depends on temperature, this is not the case in poly-PbO, which evidences that dispersive transport is caused by the spatial inhomogeneity of the material and not by the energy disorder.
authors.affiliation: Chemistry and Material Science Program, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada.
authors.forename: O
authors.initials: O
authors.lastname: Semeniuk
authors.affiliation: Department of Solid State Electronics, Vilnius University, Saulėtekio 9 III k., 10222 Vilnius, Lithuania.
authors.forename: G
authors.initials: G
authors.lastname: Juska
authors.affiliation: Faculty of Physics, Philipps University Marburg, Renthof 6, 35032 Marburg, Germany.
authors.forename: J-O
authors.initials: JO
authors.lastname: Oelerich
authors.affiliation: Faculty of Physics, Philipps University Marburg, Renthof 6, 35032 Marburg, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Wiemer
authors.affiliation: Faculty of Physics, Philipps University Marburg, Renthof 6, 35032 Marburg, Germany.
authors.forename: S D
authors.initials: SD
authors.lastname: Baranovskii
authors.affiliation: Department of Physics, Lakehead University, 955 Oliver Road, Thunder Bay, ON, P7B 5E1, Canada.|Advanced detection devices department, Thunder Bay Regional Research Institute, 290 Munro Street, Thunder Bay, ON, P7A 7T1, Canada.
authors.forename: A
authors.initials: A
authors.lastname: Reznik