Electrical conductivity of TiO_2 within n-p transition -- Part II - Electrical conductivity components

摘要

The present paper reports the electrical properties of undoped TiO_2 single crystal in terms of the conductivity components for electrons, holes and ions and the related transference numbers within the n-p transition regime. These data indicate that ionic conductivity in TiO_2 may assume a substantial value, which cannot be ignored. The minimum of the electrical conductivity at the n-p transition and its electronic component, were used for the determination of the band gap, which is 3.13 and 3.1 eV respectively.