title: An advanced fabrication method of highly ordered ZnO nanowire arrays on silicon substrates by atomic layer deposition.
abstract: In this work, the controlled fabrication of highly ordered ZnO nanowire (NW) arrays on silicon substrates is reported. Si NWs fabricated by a combination of phase shift lithography and etching are used as a template and are subsequently substituted by ZnO NWs with a dry-etching technique and atomic layer deposition. This fabrication technique allows the vertical ZnO NWs to be fabricated on 4 in Si wafers. Room temperature photoluminescence and micro-photoluminescence are used to observe the optical properties of the atomic layer deposition (ALD) based ZnO NWs. The sharp UV luminescence observed from the ALD ZnO NWs is unexpected for the polycrystalline nanostructure. Surprisingly, the defect related luminescence is much decreased compared to an ALD ZnO film deposited at the same time ona plane substrate. Electrical characterization was carried out by using nanomanipulators. With the p-type Si substrate and the n-type ZnO NWs the nanodevices represent p–n NW diodes.The nanowire diodes show a very high breakthrough potential which implies that the ALD ZnO NWs can be used for future electronic applications.
authors.affiliation: Institute of Microsystems Engineering, University of Freiburg, Georges Koehler Allee 103, Freiburg, Germany. kittitat.subannajui@imtek.uni-freiburg.de
authors.forename: Kittitat
authors.initials: K
authors.lastname: Subannajui
authors.forename: Firat
authors.initials: F
authors.lastname: Güder
authors.forename: Julia
authors.initials: J
authors.lastname: Danhof
authors.forename: Andreas
authors.initials: A
authors.lastname: Menzel
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang
authors.forename: Lutz
authors.initials: L
authors.lastname: Kirste
authors.forename: Chunyu
authors.initials: C
authors.lastname: Wang
authors.forename: Volker
authors.initials: V
authors.lastname: Cimalla
authors.forename: Ulrich
authors.initials: U
authors.lastname: Schwarz
authors.forename: Margit
authors.initials: M
authors.lastname: Zacharias
mesh_terms: D004553:Electric Conductivity; D004595:Electroplating; D046911:Macromolecular Substances / Q000737:chemistry; D008422:Materials Testing; D008968:Molecular Conformation; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D012666:Semiconductors; D012825:Silicon / Q000737:chemistry*; D013499:Surface Properties; D015034:Zinc Oxide / Q000737:chemistry*
chemical_list: D046911:Macromolecular Substances; D015034:Zinc Oxide; D012825:Silicon