PbTe(Ga) films are obtained by the laser deposition technique from the
two-phase alloy PbTe + GaTe. The GaTe content in the target is varied
from 0.5 to 5 mol%. Electron diffraction, LIMS, SNMS, and Auger micro
analysis are used for the investigation of the crystal structure and t
he gallium distribution in the films. Electric and photoelectric prope
rties are measured in the temperature interval from 4.2 to 300 K. The
correlation between the composition of the growth melt, the film struc
ture, and electric and photoelectric properties is established. The co
mposition range in which the activation energy of conductivity of the
films is close to that for high-ohmic bulk material (E(a) almost-equal
-to 140 meV) is determined. For these films persistent photoconductivi
ty at T less-than-or-equal-to 100 K is observed.