Crystalline ultrasmooth self-assembled monolayers of alkylsilanes for organic field-effect transistors

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung


  • Yutaka Ito - , Stanford University, Toppan Printing Co., Ltd. (Autor:in)
  • Ajay A. Virkar - , Stanford University (Autor:in)
  • Stefan Mannsfeld - , Stanford University, SLAC National Accelerator Laboratory (Autor:in)
  • Hak Oh Joon - , Stanford University (Autor:in)
  • Michael Toney - , Stanford University (Autor:in)
  • Jason Locklin - , University of Georgia (Autor:in)
  • Zhenan Bao - , Stanford University (Autor:in)


Crystalline self-assembled monolayers (SAMs) of organosilane compounds such as octadecyl-trimethoxysilane (OTMS) and octadecyltrichlorosilane (OTCS) were deposited by a simple, spin-casting technique onto Si/SiO2 substrates. Fabrication of the OTMS SAMs and characterization using ellipsometry, contact angle, atomic force microscopy (AFM), grazing angle attenuated total reflectance Fourier transform infrared (GATR-FTIR) spectroscopy and grazing incidence X-ray diffraction (GIXD) are described. The characterization confirms that these monolayers exhibit a well-packed crystalline phase and a remarkably high degree of smoothness. Semiconductors deposited by vapor deposition onto the crystalline OTS SAM grow in a favorable two-dimensional layered growth manner which is generally preferred morphologically for high charge carrier transport. On the OTMS SAM treated dielectric, pentacene OFETs showed hole mobilities as high as 3.0 cm 2/V·s, while electron mobilities as high as 5.3 cm 2/V·s were demonstrated for C60.


Seiten (von - bis)9396-9404
FachzeitschriftJournal of the American Chemical Society
PublikationsstatusVeröffentlicht - 8 Juli 2009
Extern publiziertJa