Extinction Enhancement from a Self-Assembled Quantum Dots Monolayer Using a Simple Thin Films Process

Matan Galanty, Shira Yochelis, Liron Stern, Irene Dujovne, Uriel Levy, Yossi Paltiel

Research output: Contribution to journalArticlepeer-review

Abstract

Hybrid nanostructures are attractive for future use in a variety of optoelectronic devices. Self-assembled hybrid organic/quantum dots can couple quantum properties to semiconductor devices and modify their functionality. These devices are simple to fabricate and control; however, they usually demonstrate low quantum efficiency. In this work we present experimental results of large extinction enhancement from a monolayer of colloidal quantum dots using a thin gold film evaporation forming random gold nanoparticles that act as plasmonic antennas. The random structures guarantee no sensitivity to polarization changes. The fabrication process of the plasmonic gold nanoparticles is simple and cheap and can be easily integrated with existing semiconductor devices. By matching the plasmonic resonance and the colloidal quantum dots bandgap we achieve up to 16% light extinction, which is 13-fold enhancement, compared to the reference. These results may pave the way toward realizing more efficient and sensitive photon detectors.

Original languageAmerican English
Pages (from-to)24991-24995
Number of pages5
JournalJournal of Physical chemistry c
Volume119
Issue number44
DOIs
StatePublished - 16 Oct 2015

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • General Energy
  • Surfaces, Coatings and Films
  • Physical and Theoretical Chemistry

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