Polyimide/Ta2O5 nanocomposite gate insulators for enhanced organic thin-film transistor performance

Liang Hsiang Chen, Pang Lin, Jia Chong Ho, Cheng Chung Lee, Choongik Kim, Ming Chou Chen

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


This study reports the preparation and characterization of polyimide/Ta2O5 nanocomposite films as insulators for organic thin-film transistors (OTFTs). The degree of imidization, thermal, electrical, and surface properties of the nanocomposite films were characterized as a function of Ta2O5 precursor contents. The nanocomposite films, with controlled/comparable insulator electrical characteristics and surface properties, have been found to enhance dielectric constant compared to pristine polyimide films, which resulted in improved pentacene TFT performance by a factor of 2-3 with carrier mobility values as high as 0.38 cm2/V s.

Original languageEnglish
Pages (from-to)1527-1531
Number of pages5
JournalSynthetic Metals
Issue number15-16
StatePublished - Aug 2011


  • Gate insulator
  • Hybrid films
  • Nanocomposite
  • Organic thin-film transistors (OTFTs)


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