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All-Inorganic Field Effect Transistors Fabricated by Printing.

Ridley1, Nivi, Jacobson

  • 1The Media Laboratory, Massachusetts Institute of Technology, 20 Ames Street, Cambridge, MA 02139, USA.

Science (New York, N.Y.)
|October 26, 1999
PubMed
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This summary is machine-generated.

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Researchers printed inorganic thin-film transistors using cadmium selenide nanocrystals. These printed transistors exhibit high field-effect mobility, surpassing organic alternatives and paving the way for low-cost, high-performance printed electronics.

Area of Science:

  • Materials Science
  • Nanotechnology
  • Electronics Engineering

Background:

  • Printed electronics offer a low-cost alternative to traditional semiconductor fabrication.
  • Existing printed organic transistors suffer from limited charge carrier mobility.
  • High-performance inorganic semiconductors are typically processed using energy-intensive methods.

Purpose of the Study:

  • To develop a method for printing high-performance inorganic thin-film transistors.
  • To achieve high field-effect mobility in printed transistors using nanocrystal inks.
  • To explore the potential for low-cost, large-area inorganic electronics on flexible substrates.

Main Methods:

  • Synthesis of discrete cadmium selenide (CdSe) nanocrystals (<2 nm) with minimal organic capping groups.

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  • Solution-based printing of CdSe nanocrystal films.
  • Low-temperature processing to induce grain growth and form single-crystal domains.

    • Main Results:

    • Achieved field-effect mobilities up to 1 cm²/Vs in printed CdSe thin-film transistors.
    • Demonstrated mobility an order of magnitude higher than previously reported printed organic transistors.
    • Observed low-temperature grain growth forming large single-crystal areas from the nanocrystal solution.

    Conclusions:

    • CdSe nanocrystal solutions enable the fabrication of high-quality inorganic thin-film transistors via printing.
    • The achieved mobility represents a significant advancement for printed inorganic electronics.
    • This approach offers a viable route towards inexpensive, high-performance printed logic circuits on plastic substrates.