Fast current blinking in individual PbS and CdSe quantum dots. Journal Article uri icon



  • Fast current intermittency of the tunneling current through single semiconductor quantum dots was observed through time-resolved intermittent contact conductive atomic force microscopy in the dark and under illumination at room temperature. The current through a single dot switches on and off at time scales ranging from microseconds to seconds with power-law distributions for both the on and off times. On states are attributed to the resonant tunneling of charges from the electrically conductive AFM tip to the quantum dot, followed by transfer to the substrate, whereas off states are attributed to a Coulomb blockade effect in the quantum dots that shifts the energy levels out of resonance conditions due to the presence of the trapped charge, while at the same bias. The observation of current intermittency due to Coulomb blockade effects has important implications for the understanding of carrier transport through arrays of quantum dots.

publication date

  • June 12, 2013

has restriction

  • closed

Date in CU Experts

  • March 13, 2015 11:27 AM

Full Author List

  • Maturova K; Nanayakkara SU; Luther JM; van de Lagemaat J

author count

  • 4

Other Profiles

Electronic International Standard Serial Number (EISSN)

  • 1530-6992

Additional Document Info

start page

  • 2338

end page

  • 2345


  • 13


  • 6