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[1]. A new proposed  mechanism  of  photoexcitation, which  is  triggered  by  an  e?cient  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.[1] A. Shabaev, Al. L. Efros, and A. L. Efros, NanoLetters published ASAP, DOI:  10.1021/nl403033f (2013)

Dark and photoconductivity in ordered array of nanocrystals

247th National Meeting (2014)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.