Abstract
Pulsed photoconduction measurements are made with anthracene crystals heavily doped with 2,3-dimethylnaphthalene (DMN). This system forms a solid solution in a fairly wide concentration range. In these crystals charge carrier transport is thought to occur through anthracene sites. It is found that DMN doping (≈1%) makes the carrier transport insensitive to deep traps, which are present in neat anthracene crystals. This is accounted for in terms of random walks of the carriers in a lattice which contains antitraps. With higher levels of doping, carriers exhibit a dispersive behavior which we believe is the first observation of a dispersive transport in a crystalline lattice.
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