Physicochemically stable polymer-coupled oxide dielectrics for multipurpose organic electronic applications

Se Hyun Kim, Mi Jang, Hoichang Yang, John E. Anthony, Chan Eon Park

Research output: Contribution to journalArticlepeer-review

101 Scopus citations


A chemically coupled polymer layer is introduced onto inorganic oxide dielectrics from a dilute chlorosilane-terminated polystyrene (PS) solution. As a result of this surface modification, hydrophilic-oxide dielectrics gain hydrophobic, physicochemically stable properties. On such PS-coupled SiO 2 or AlOx dielectrics, various vacuum- and solution-processable organic semiconductors can develop highly ordered crystalline structures that provide higher field-effect mobilities (μFETs) than other surface-modified systems, and negligible hysteresis in organic field-effect transistors (OFETs). In particular, the use of PS-coupled AlOx nanodielectrics enables a solution-processable triethylsilylethynyl anthradithiophene OFET to operate with μFET ∼ 1.26 cm2 V-1 s-1 at a gate voltage below -1 V. In addition, a complementary metal-oxide semiconductor-like organic inverter with a high voltage gain of approximately 32 was successfully fabricated on a PS-coupled SiO2 dielectric. Ultrathin polymer layers were chemically coupled on oxide dielectrics with chlorosilane-terminated polystyrene (PS). The PS-brush layer was physicochemically stable and provided a smooth, hydrophobic surface to induce highly ordered crystalline structures of vacuum- and solution-processable organic semiconductors. In particular, PS-coupled AlOx nanodielectrics allowed solution-processable organic field-effect transistors to operate at a gate voltage of approximately -1 V, with a field-effect mobility of ∼1.26 cm2 V-1 s -1.

Original languageEnglish
Pages (from-to)2198-2207
Number of pages10
JournalAdvanced Functional Materials
Issue number12
StatePublished - Jun 21 2011


  • low voltage operation
  • N,N-ditridecyl-3,4,9,10-perylene tetracarboxylic diimide (PTCDI-C13)
  • organic field-effect transistors
  • polymer dielectrics
  • triethylsilylethynyl anthradithiophene (TES-ADT)

ASJC Scopus subject areas

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


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