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Title: Transferred metal electrode films for large-area electronic devices

The evaporation of metal-film gate electrodes for top-gate organic field-effect transistors (OFETs) limits the minimum thickness of the polymer gate dielectric to typically more than 300 nm due to deep hot metal atom penetration and damage of the dielectric. We show here that the self-release layer transfer method recently developed for high-quality graphene transfer is also capable of giving high-quality metal thin-film transfers to produce high-performance capacitors and OFETs with superior dielectric breakdown strength even for ultrathin polymer dielectric films. Dielectric breakdown strengths up to 5–6 MV cm{sup −1} have been obtained for 50-nm thin films of polystyrene and a cyclic olefin copolymer TOPAS{sup ®} (Zeon). High-quality OFETs with sub-10 V operational voltages have been obtained this way using conventional polymer dielectrics and a high-mobility polymer semiconductor poly[2,5-bis(3-tetradecylthiophene-2-yl)thieno[3,2-b]thiophene-2,5-diyl]. The transferred metal films can make reliable contacts without damaging ultrathin polymer films, self-assembled monolayers and graphene, which is not otherwise possible from evaporated or sputtered metal films.
Authors:
 [1] ;  [2] ;  [3] ;  [3] ;  [4]
  1. Department of Physics, National University of Singapore, Lower Kent Ridge Road, Singapore S117543 (Singapore)
  2. (NGS), National University of Singapore, Medical Drive, Singapore S117456 (Singapore)
  3. Department of Chemistry, National University of Singapore, Lower Kent Ridge Road, Singapore S117543 (Singapore)
  4. (Singapore)
Publication Date:
OSTI Identifier:
22391973
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 19; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; CAPACITORS; COPOLYMERS; DIELECTRIC MATERIALS; ELECTRODES; ELECTRONIC EQUIPMENT; FIELD EFFECT TRANSISTORS; GRAPHENE; METALS; POLYSTYRENE; SPUTTERING; THIN FILMS; THIOPHENE