Abstract
The temperature and electrical field dependent conductivity of -type CdSe nanocrystal thin films is investigated. In the low electrical field regime, the conductivity follows in the temperature range . At high electrical field, the conductivity is strongly field dependent. At 4 K, the conductance increases by 8 orders of magnitude over one decade of bias. At a very high field, conductivity is temperature independent with . The complete behavior is very well described by variable range hopping with a Coulomb gap.
- Received 22 December 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.216802
©2004 American Physical Society