Electrical and photoelectrical properties of Bi2TeO5 single crystals

Abstract

We report on optical and electrical measurements contributing for a better characterization of the relevant properties of undoped Bi2TeO5. Optical absorption, dark conductivity, photoconductivity and photovoltaic effect measurements were carried out for different crystallographic directions at room temperature. The position of photoactive centers in the Band Gap were determined and the optical Bandgap was calculated. The components of dark conductivity tensor were determined.