Paint-on optoelectronics

Sjoerd Hoogland*, Gerasimos Konstantatos, Edward H. Sargent

*Corresponding author for this work

Research output: Contribution to specialist publicationArticle


A group of researchers at the University of Toronto have demonstrated a wet semiconductor device with a painted-on layer of nanoparticles that works better that standard chips. The substrate used was a glass slide pre-patterned with identical gold electrodes laterally spaced between 5 μm. The substrate was spun on a plate just the way the photoresist is induced to spread out, forming a thin, uniform film prior to photolithography. A large conductive gain with near-minimal noise gave an ultrasensitive photodetector that worked in the short-wavelength infrared range used in communication and biomedical procedures. Scientists are also interested in pursuing a source of infrared light that can be directly integrated on a silicon chip. The low cost and ease of integration of spin-on sensors, sources and photovoltaic elements could revolutionize communications, computing, imaging, and energy conversion.

Original languageEnglish (US)
Number of pages6
Specialist publicationOptics and Photonics News
StatePublished - Nov 2006

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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