Channel Length Dependent Characterisations of Organic Thin Film Transistors with Solution Processable Gadolinium Phthalocyanine Derivatives

Seema Barard, Debdyuti Mukherjee, Sujoy Sarkar, Theo Kreouzis, Isabelle Chambrier, Andy Cammidge, Asim K. Ray

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Abstract

Spin-coated 52-nm-thick films of newly synthesised gadolinium liquid crystalline bisphthalocyanine sandwich (GdPc 2) complexes with octyl chains non-peripheral positions have been successfully employed as active layers for bottom-gate organic field effect transistors having both short (5μm) and long (20μm) channels. The scaling down of the channel length (L) decreases the field effect mobility due to the increase in the contact resistance between the gold electrodes and the GdPc 2 semiconducting layer. Values of on–off ratio and sub-threshold voltage swing are higher nearly one order of magnitude for L=5μm than those for L=20μm.

Original languageEnglish
Pages (from-to)265-273
Number of pages9
JournalJournal of Materials Science: Materials in Electronics
Volume31
Issue number1
Early online date21 Nov 2019
DOIs
Publication statusPublished - Jan 2020

Keywords

  • BEHAVIOR
  • BISPHTHALOCYANINE
  • COPPER PHTHALOCYANINE
  • FIELD-EFFECT TRANSISTORS
  • MOBILITY
  • MODEL
  • SEMICONDUCTOR
  • TRANSPORT

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