title: Dark and photo-conductivity in ordered array of nanocrystals.
abstract: A theory of photo- and dark-band conductivities in semiconductor supercrystals consisting of nanocrystals is developed by assuming scattering by structural defects in the supercrystals. A new proposed mechanism of photoexcitation, which is triggered by an efficient Auger ionization of charged nanocrystals, provides explanation for the measured photocurrent being 2-3 orders of magnitude larger than the dark current. For dark conductivity, the metal-insulator transitions and temperature dependence of mobility in the metal phase are considered.
authors.affiliation: George Mason University , Fairfax, Virginia 22030 United States.
authors.forename: Andrew
authors.initials: A
authors.lastname: Shabaev
authors.forename: Alexander L
authors.initials: AL
authors.lastname: Efros
authors.forename: Alexei L
authors.initials: AL
authors.lastname: Efros
mesh_terms: D008670:Metals; D053758:Nanoparticles / Q000737:chemistry*; D036103:Nanotechnology; D010316:Particle Size; D012666:Semiconductors; D013696:Temperature
chemical_list: D008670:Metals