Large Spatially Resolved Rectification in a Donor-Acceptor Molecular Heterojunction

Joseph A. Smerdon, Noel C. Giebink, Nathan P. Guisinger, Pierre Darancet, Jeffrey R. Guest

Research output: Contribution to journalArticle

13 Scopus citations

Abstract

We demonstrate that rectification ratios (RR) of ≳250 (≳1000) at biases of 0.5 V (1.2 V) are achievable at the two-molecule limit for donor-acceptor bilayers of pentacene on C60 on Cu using scanning tunneling spectroscopy and microscopy. Using first-principles calculations, we show that the system behaves as a molecular Schottky diode with a tunneling transport mechanism from semiconducting pentacene to Cu-hybridized metallic C60. Low-bias RRs vary by two orders-of-magnitude at the edge of these molecular heterojunctions due to increased Stark shifts and confinement effects.

Original languageEnglish (US)
Pages (from-to)2603-2607
Number of pages5
JournalNano letters
Volume16
Issue number4
DOIs
StatePublished - Apr 13 2016

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this