title: Characterization of planar pn heterojunction diodes constructed with Cu2O nanoparticle films and single ZnO nanowires.
abstract: In this study, we fabricate planar pn heterojunction diodes composed of Cu2O nanoparticle (NP) films and single ZnO nanowires (NWs) on SiO2 (300 nm)/Si substrates and investigate their characteristics in the dark and under the illumination of white light and 325 nm wavelength light. The diode at bias voltages of +/- 1 V shows rectification ratios of 10 (in the dark) and 34 (under the illumination of white light). On the other hand, the diode exposed to the 325 nm wavelength light exhibits Ohmic characteristics which are associated with efficient photocurrent generation in both the Cu2O NP film and the single ZnO NW.
authors.affiliation: Department of Electrical Engineering, Korea University, Seoul 137-701, Korea.
authors.forename: Kiyeol
authors.initials: K
authors.lastname: Kwak
authors.forename: Kyoungah
authors.initials: K
authors.lastname: Cho
authors.forename: Sangsig
authors.initials: S
authors.lastname: Kim
mesh_terms: D003300:Copper / Q000737:chemistry* / Q000528:radiation effects; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D053758:Nanoparticles / Q000737:chemistry* / Q000528:radiation effects* / Q000648:ultrastructure; D010783:Photometry / Q000295:instrumentation*; D012666:Semiconductors; D015034:Zinc Oxide / Q000737:chemistry* / Q000528:radiation effects
chemical_list: D003300:Copper; D015034:Zinc Oxide; C030973:cupric oxide