Deep exponential distribution of traps in naphthalene

Abstract
The long‐time decay of the surface potential of corona‐charged naphthalene crystals has been analyzed. The decay curves are explained using an exponential distribution of traps of the form exp[−(E−1.1 eV)/kTc], where Tc∼600 °K. The total number of traps is estimated to be approximately 1013/cm3. The long‐time decay is also evidence for dispersive transport in crystalline material due to a distribution of traps.