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Title: The importance of spinning speed in fabrication of spin-coated organic thin film transistors: Film morphology and field effect mobility

We have investigated the film morphology and the field effect mobility of 2,7-dioctyl[1]benzothieno[3,2-b][1]benzothiophene (C8-BTBT) thin films which were formed by spin coating on the SiO{sub 2} substrate with solution-processed graphene electrodes. The domain size and the density of aggregates in the C8-BTBT film showed the same dependence on the spinning speed. These competitive two factors (domain size and density of aggregates) give an optimum spinning speed, at which the field effect mobility of C8-BTBT transistor showed a maximum (2.6 cm{sup 2}/V s). This result indicates the importance of spinning speed in the fabrication of solution processed organic thin film transistors by spin coating.
Authors:
;  [1] ;  [2] ; ;  [3] ;  [1] ;  [4]
  1. Department of Chemistry, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561 (Japan)
  2. Department of Complexity Science and Engineering, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561 (Japan)
  3. Department of Advanced Materials Science, The University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8561 (Japan)
  4. (Japan)
Publication Date:
OSTI Identifier:
22300015
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 104; Journal Issue: 23; 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; CARRIER MOBILITY; DENSITY; ELECTRODES; FIELD EFFECT TRANSISTORS; GRAPHENE; SILICA; SILICON OXIDES; SOLUTIONS; SPIN; SPIN-ON COATING; SUBSTRATES; THIN FILMS; THIONAPHTHENES; TRANSISTORS