Nanoscale conducting channels at the surface of organic semiconductors formed by decoration of molecular steps with self-assembled molecules

Bumsu Lee, Taekjib Choi, Sang Wook Cheong, Vitaly Podzorov

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Under certain conditions, self-assembling molecules preferentially bind to molecular steps at the surface of crystalline orpnic semiconductors, inducing a strong local doping effect This creates macroscopically long conducting paths of nanoscale width (a single crystalline analogue of organic nanowires) that can span distances of up to 1 cm between electrical contacts. The observed effect of molecular step decoration opens intriguing possibilities for visualization, passivation, and selective doping of surface and interfacial defects in organic electronic devices and provides a novel system for research on nanoscale charge transport in organic semiconductors. In addition, this effect sheds light on the microscopic origin of nucleation and growth of selfassembled monolayers at organic surfaces. It can also have implications in electronic patterning, nanoscale chemical sensors, integrated interconnects and charge-transfer interfaces in organic transistors and solar cells.

Original languageEnglish (US)
Pages (from-to)3726-3730
Number of pages5
JournalAdvanced Functional Materials
Volume19
Issue number23
DOIs
StatePublished - Sep 12 2009

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Chemistry(all)
  • Materials Science(all)

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