Hole conduction in pure and doped lead bromide crystals

Abstract

The conductivity of pure and doped lead bromide was measured in a bromine atmosphere in the temperature region 25–200°C. The defect chemistry of nonstoichiometric lead bromide is presented. The hole mobility was derived from the time dependent change in the conductivity after admission/removal of the bromine ambient. Preliminary evidence is presented for hole trapping at Fe2+ and Cu+ centres in lead bromide.