A study of the thermovoltaic effect in heterostructures based on Sm$_{1-x}$Gd$_{x}$S solid solutions

The influence of doping of samarium monosulfide with gadolinium has been investigated. Experiments have been carried out in the temperature range of 300–450 K. A decrease in the effect value with increasing gadolinium content in the Sm$_{1-x}$Gd$_{x}$S heterostructure with $x$ ranged from 0 to 0.13 has been found and explained. Formulas for calculating the output signal in dependence of the doping value have been derived.