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Keywords:

  • quantum dots;
  • nanocrystals;
  • wet techniques;
  • organic light emitting diode;
  • Langmuir–Schaeffer
Thumbnail image of graphical abstract

Quantum dot (QD) LEDs of high color purity, and low turn-on voltage and leakage current are prepared using a solvent free method. First, a monolayer of QDs is formed at the air/water interface, which is then transferred with a PDMS stamp onto the device. The method is applicable to large substrates and reduces materials consumption as compared to other deposition techniques.