On the role of hydrogen in organic magnetoresistance: A study of C60 devices

T. D. Nguyen, Y. Sheng, M. Wohlgenannt*, Thomas Anthopoulos

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations

Abstract

The organic magnetoresistive (OMAR) effect has been observed in many different organic semiconductors, whereas a corresponding effect has not been reported for inorganic ones. What property makes organics behave so differently regarding magnetotransport? By studying C60 devices using several different electrode materials we show that C60, unlike many other organic semiconductors, does not exhibit any intrinsic OMAR effect. However, we find that as soon as the carriers in C60 are brought in proximity with hydrogen-containing compounds, either in the form of a polymeric electrode, or side-chain substituents, a weak OMAR effect is observed. This shows that hydrogen is crucial for the observation of OMAR.

Original languageEnglish (US)
Pages (from-to)930-934
Number of pages5
JournalSynthetic Metals
Volume157
Issue number22-23
DOIs
StatePublished - Nov 1 2007

Keywords

  • Carbon-60
  • Fullerene
  • Hyperfine
  • OMAR
  • Organic magnetoresistance
  • PCBM

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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