Defects responsible for abnormal n-type conductivity in Ag-excess doped PbTe thermoelectrics

Byungki Ryu, Min-Wook Oh, Jae Ki Lee +6

We find that Ag-interstitial ($A{g}_I$) acts as an electron donor and plays an important role in Ag-excess doped polycrystalline PbTe thermoelectric materials. When Ag is heavily dop…