Narrowband light detection via internal quantum efficiency manipulation of organic photodiodes

Spectrally selective light detection is vital for full-colour and near-infrared (NIR) imaging and machine vision. This is not possible with traditional broadband-absorbing inorganic semiconductors without input filtering, and is yet to be achieved for narrowband absorbing organic semiconductors. We demonstrate the first sub-100 nm full-width-at-half-maximum visible-blind red and NIR photodetectors with state-of-the-art performance across critical response metrics. These devices are based on organic photodiodes with optically thick junctions. Paradoxically, we use broadband-absorbing organic semiconductors and utilize the electro-optical properties of the junction to create the narrowest NIR-band photoresponses…

• UD
  U.S. Department of Energy

  Award: DE-SC0001342
• AN
  Australian National Fabrication Facility
• UO
  University of Queensland
• OO
  Office of Science
• AR
  Australian Research Council

  Award: DP120103726
• DO
  Division of Materials Research
• BE
  Basic Energy Sciences

  Awards: DE-SC0001342, DE-SC0001342:001