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Keywords:

  • Organic electronics;
  • Thiophenes;
  • Phenylene;
  • Co-oligomers;
  • Light-emitting field-effect transistor
Thumbnail image of graphical abstract

A novel organic LEFET device with a simple device constitution is presented. The device is equipped with a diffraction grating that is formed on the gate insulator so that it is located outside the channel region. When the device is operated with square-wave alternating gate voltages, the spectrally-narrowed emissions are definitively observed with FWHM ∼2 nm.