Mixed metal electrode for ambipolar charge injection

Prof. Gitti Frey | Materials Science and Engineering


Chemistry and Materials | Physics and Electro-Optics

The Technology

Ambipolar transistors can transport holes and electrons, separately or concurrently, within the semiconducting channel. The operation of the device requires that the semiconducting material composing the device is capable of efficiently transporting both charge carriers, and the suitable alignment of energy levels between the semiconductor and the metal electrodes for efficient injection of both carriers from the electrodes into the semiconducting channel.

While inorganic semiconducting materials, can conduct either holes or electrons depending on the type of doping, most organic semiconducting materials have relatively narrow bandgaps and are capable of conducting electrons and holes alternatively or simultaneously.

The main challenge of building organic ambipolar transistors is finding metallic contacts that can efficiently inject both electrons and holes, separately or concurrently, into the semiconductor channel. The Technology offers a new type of electrode for ambipolar transistors and its fabrication process.


  • Simple and Tunable process

Applications and Opportunities

  • Ambipolar transistors or phototransistors
  • Memristors
  • Various devices that requires ambipolar charge injection
arrow Business Development Contacts
Shikma Litmanovitz
Director of Business Development, Physical Science