Abstract
GaS x Se1−x solid solutions are grown from the vapour by means of the I2-assisted transport method, varying the sulphur percentagex in steps of 0.1. Resistivity, Hall mobilities and carrier concentrations are measured at room temperature in the complete series of solid solutions by using the Van der Pauw method. Their behaviour as a function ofx is correlated to the dependence of the lattice parameters and of the energy gap on the chemical composition, as determined by various techniques. The analysis of the data reported here indicates that the electrical properties of GaS x Se1−x solid solutions grown from the vapour with iodine are determined both by the structural characteristics of the crystals and by the I2 incorporation during the growth.
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