Fluctuations of electroluminescence intensity of single CdSe nanocrystals excited by scanning tunneling microscope current

► Luminescence of single CdSe NC is excited by scanning tunneling microscope current. ► Gold substrates with low and high density of CdSe NC were prepared. ► Fluctuations of electroluminescence intensity were measured. ► Distribution of photons in electroluminescence was measured. ► A microscopic model for absorber/emitter has been found.