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A tunable diode based on an inorganic Semiconductor&cjs3539;Conjugated polymer interface

Lonergan1

  • 1Department of Chemistry and the Materials Science Institute, University of Oregon, Eugene, OR 97403-1253, USA.

Science (New York, N.Y.)
|January 4, 1998
PubMed
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This study presents a novel tunable diode using an inorganic-organic hybrid architecture. Electrochemical manipulation of poly(pyrrole) allows continuous tuning of the diode's turn-on voltage, overcoming limitations of traditional Schottky diodes.

Area of Science:

  • Materials Science
  • Electronics
  • Electrochemistry

Background:

  • Semiconductor-metal (Schottky) diodes are typically not tunable in a single device due to Fermi-level pinning.
  • Interfacial states limit the practical tunability of traditional diode architectures.

Purpose of the Study:

  • To develop a tunable diode with a hybrid inorganic-organic architecture.
  • To demonstrate electrochemical manipulation of a conjugated polymer for diode tuning.

Main Methods:

  • Fabrication of an n-indium phosphide/poly(pyrrole)/nonaqueous electrolyte diode.
  • Electrochemical manipulation of the poly(pyrrole) work function.
  • Measurement of diode turn-on voltage under varying electrochemical conditions.

Main Results:

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  • Achieved continuous and active tuning of the diode's turn-on voltage by over 0.6 volts.
  • Demonstrated the feasibility of electrochemical tuning in a hybrid diode system.
  • Highlighted the unique property of dopant ion permeation in conjugated polymers.

Conclusions:

  • Conjugated polymers offer a distinct advantage over traditional semiconductors for creating tunable electronic devices.
  • The reported architecture provides a new pathway for developing actively tunable diodes.
  • Electrochemical manipulation of polymer work functions is a viable strategy for device tuning.