Contrasting properties of free carriers in $n$- and $p$-type Sb${}_2$Se${}_3$

F. Herklotz, E. V. Lavrov, T. D. C. Hobson +3

We report persistent photoconductivity in $p$-type Sb${}_2$Se${}_3$ single crystals doped with Cd or Zn, where enhanced conductivity remains for hours after illumination ceases at temp…