J. Molenda et A. Kubik, ELECTRICAL-PROPERTIES OF NONSTOICHIOMETRIC WO3-GAMMA AT TEMPERATURES 77-K TO 300-K, Physica status solidi. b, Basic research, 191(2), 1995, pp. 471-478
Measurements of electrical conductivity, thermoelectric power, and cry
stallographic structure of tungsten trioxide are presented. It is foun
d that the predominant charge carriers are electrons related to nonsto
ichiometry in the oxygen sublattice (WO3-gamma). At gamma = 0.1 the in
vestigated material undergoes a semiconductor-metal transition of Mott
type.