Memory and photovoltaic elements in organic field effect transistors with donor/acceptor planar-hetero junction interfaces

Byoungnam Park, Sukwon Choi, Samuel Graham, Elsa Reichmanis

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Interfacial charge transfer at organic/organic planar-hetero junctions allows access to device structures that create new opportunities for flexible electronic devices. Fundamental characteristics of a pentacene/[6,6]-phenyl-C61- butyric acid methyl ester (PCBM) interface are explored via a comprehensive study of charge transfer between these two materials using the field-effect transistor (FET) geometry both in the dark and under illumination. Organic memory elements in a field effect transistor are demonstrated for a device fabricated with a pentacene/PCBM interface. Electric field induced charge transfer at the interface, in the dark, induced a nonvolatile memory effect with a large hysteresis characterized by a memory window of 43 V in the transfer characteristics. A photoinduced threshold voltage shift induced by exciton dissociation at the interface, in the absence of a gate electric field, is consistent with the formation of the photoinduced conducting channel in pentacene.

Original languageEnglish (US)
Pages (from-to)9390-9397
Number of pages8
JournalJournal of Physical Chemistry C
Volume116
Issue number17
DOIs
StatePublished - May 3 2012

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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