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 language | English (US) |
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Pages (from-to) | 212-217 |
Number of pages | 6 |
Journal | Chemical Physics Letters |
Volume | 495 |
Issue number | 4-6 |
DOIs | |
State | Published - Aug 10 2010 |
All Science Journal Classification (ASJC) codes
- General Physics and Astronomy
- Physical and Theoretical Chemistry