  Near-room-temperature electronic transport of annealing induced
semiconducting crystallites embedded within its amorphous counterpart is
treated within the effective-medium approach. As such, the mixtures transport
coefficients become smooth functions of those of its two components. Carrier
mobilities in the crystallites are assumed much larger than those of the
amorphous phase. Nonetheless, crystallites act as macroscopic traps when their
carriers energies lie below those in the amorphous phase. Then the mixtures dc
conductivity falls below that of the amorphous phase at low enough carrier
concentrations. However, with increasing carrier concentration the shifting
chemical potential diminishes this trapping effect enabling crystallites larger
mobilities to drive the mixtures electrical conductivity above that of the
amorphous phase. Meanwhile the Seebeck coefficient remains insensitive to the
annealing-induced introduction and growth of embedded crystallites. These
features are qualitatively similar to those reported for an amorphous organic
polymer with annealing-induced embedded crystallites.
