Spontaneous aggregation of pentacene molecules and its influence on field effect mobility

Genki Yoshikawa, Jerzy T. Sadowski, Abdullah Al-Mahboob, Yasunori Fujikawa, Toshio Sakurai, Yuki Tsuruma, Susumu Ikeda, Koichiro Saiki

Research output: Contribution to journalArticlepeer-review

28 Citations (Scopus)

Abstract

The authors have found that pentacene molecules deposited on SiO 2 substrates treated with self-assembled monolayers, such as hexamethyldisilazane or octadecyltrichlorosilane, aggregate spontaneously. In situ, real-time low-energy electron microscopy investigation of the morphological changes in pentacene films deposited under ultrahigh vacuum, reveals that the balance between pentacene film and substrate surface energies is an origin of this aggregation. With in situ atomic force microscopy - field effect transistor measurements, the authors demonstrate that field effect mobility is critically affected by this aggregation.

Original languageEnglish
Article number251906
JournalApplied Physics Letters
Volume90
Issue number25
DOIs
Publication statusPublished - 2007
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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