Relative permittivity and Hubbard U of pentacene extracted from scanning tunneling microscopy studies of p-doped films

Sieu D. Ha, Yabing Qi, Antoine Kahn

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Temperature-dependent I-V measurements determine that pentacene is effectively p-doped by tetrafluoro-tetracyanoquinodimethane (F 4-TCNQ). It has been shown by scanning tunneling microscopy (STM) that the donated hole is localized by the ionized dopant counter potential, and that the hole can be visualized [4]. Here, it is argued that the effect of the localized hole on STM images should depend on distance as 1/r, as per the Coulomb potential. By fitting line profiles of localized hole features to the Coulomb potential, it is shown that approximate values for the relative permittivity and Hubbard U of pentacene can be extracted.

Original languageEnglish (US)
Pages (from-to)212-217
Number of pages6
JournalChemical Physics Letters
Volume495
Issue number4-6
DOIs
StatePublished - Aug 10 2010

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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