Impact of Donor Dopant on Acceptor Solubility in TlBr

The predicted dependence of TlBr room temperature ionic conductivity on divalent donor and acceptor dopant concentration is presented, taking into account acceptor dopant exsolution and dopant-defect association. Donor-acceptor compensation is found to play a key role in determining the ultimate room temperature conductivity with donors increasing the solubility of acceptors from 0.04 ppm (0 donor) to 0.84 ppm (1 ppm donor) to 8.4 ppm (10 ppm donor).