Vapor-phase molecular layer deposition of self-assembled multilayers for organic thin-film transistor

Byoung H. Lee, Kwang H. Lee, Seongil Im, Myung M. Sung

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report a vapor-phase molecular layer deposition (MLD) of self-assembled multilayer thin films for organic thin-film transistor. In the present MLD process, alkylsiloxane self-assembled multilayers (SAMs) were grown under vacuum by repeated sequential adsorptions of C=C-terminated alkylsilane and aluminum hydroxide with ozone activation. The MLD method is a self-controlled layer-by-layer growth process, and is perfectly compatible with the atomic layer deposition (ALD) method. The SAMs films prepared exhibited good mechanical flexibility and stability, excellent insulating properties, and relatively high dielectric capacitances of 374 nF/cm 2 with a high dielectric strength of 4 MV/cm. They were then used as a 12 nm-thick dielectric for pentacene-based thin-film transistors (TFTs), which showed a maximum field effect mobility of 0.57 cm 2/V s, operating at -4 V with an on/off current ratio of ∼10 3.

Original languageEnglish
Pages (from-to)6962-6967
Number of pages6
JournalJournal of Nanoscience and Nanotechnology
Volume9
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

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All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Biomedical Engineering
  • Materials Science(all)
  • Condensed Matter Physics

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