Preparation of light-emitting organic field-effect transistors with asymmetric electrodes

Tomo Sakanoue*, Ryo Yamada, Hirokazu Tada

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Light-emitting organic field-effect transistors (LEOFETs) based on Poly [2-methoxy, 5-(2′-ethyl-hexoxy)-1, 4-phenylenevinylene] (MEH-PPV), α-sexithiophene (α-6T) and N,N′-Ditridecylperylene-3,4,9,10- tetracarboxylic diimide (PTCDI-C13) were prepared on a SiO 2 gate insulator. The LEOFETs based on MEH-PPV and α-6T showed a p-type semiconducting behavior whereas PTCDI-C13 operated in n-type FET. Asymmetric electrodes of Au-Al were prepared by twice of photolithography and lift-off techniques, and by electroplating of Au onto Al electrode to improved device performances. The emission efficiency of the devices with Au/Cr-Al was approximately 20 times higher than that of the device with Au/Al-Au/Al electrodes at the gate and drain voltages of -100 V. The emission region was observed with an optical microscope. The emission region was found to be very homogeneous along the drain electrode, and it did not shift when the gate and drain voltages changed. Although the carrier injection was improved by using asymmetric electrodes, the number of the carriers injected from the drain electrode was still lower than that from the source electrode in the unipolar devices.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
EditorsZ. Bao, D.J. Gundlach
Number of pages8
Publication statusPublished - 2005
Externally publishedYes
EventOrganic Field-Effect Transistors IV - San Diego, CA, United States
Duration: 2005 Jul 312005 Aug 2


OtherOrganic Field-Effect Transistors IV
Country/TerritoryUnited States
CitySan Diego, CA


  • Conjugated polymer
  • Field-effect transistor
  • Light-emitting transistor
  • Organic semiconductor

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics


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