title: ZnO nanodisk based UV detectors with printed electrodes.
abstract: The fabrication of highly functional materials for practical devices requires a deep understanding of the association between morphological and structural properties and applications. A controlled hydrothermal method to produce single crystal ZnO hexagonal nanodisks, nanorings, and nanoroses using a mixed solution of zinc sulfate (ZnSO4) and hexamethylenetetramine (HMTA) without the need of catalysts, substrates, or templates at low temperature (75 °C) is introduced. Metal-semiconductor-metal (MSM) ultraviolet (UV) detectors were fabricated based on individual and multiple single-crystal zinc oxide (ZnO) hexagonal nanodisks. High quality single crystal individual nanodisk devices were fabricated with inkjet-printed silver electrodes. The detectors fabricated show record photoresponsivity (3300 A/W) and external quantum efficiency (1.2 × 10(4)), which we attribute to the absence of grain boundaries in the single crystal ZnO nanodisk and the polarity of its exposed surface.
authors.affiliation: Nanoelectronics Center, Advanced Technology Institute, University of Surrey , Guildford GU2 7XH, U.K.
authors.forename: Mohammad R
authors.initials: MR
authors.lastname: Alenezi
authors.forename: Abdullah S
authors.initials: AS
authors.lastname: Alshammari
authors.forename: Talal H
authors.initials: TH
authors.lastname: Alzanki
authors.forename: Peter
authors.initials: P
authors.lastname: Jarowski
authors.forename: Simon John
authors.initials: SJ
authors.lastname: Henley
authors.forename: S Ravi P
authors.initials: SR
authors.lastname: Silva