1993 Volume 57 Issue 7 Pages 848-851
Lead calchogenide compound semiconductors such as PbS are expected to be suitable materials for the tunable laser diodes, which lase at mid-infrared region between 3 and 4×10−6 m. In this study, the solubility range and the lattice constant of a new quaternary solid solution semiconductor Pb1−x(Ca1−ySry)xS are investigated. The solubility range was determined at 1273, 1123 and 973 K. The lattice constant is evaluated as a function of the compositions x and y. For the fabrication of the double-heterostructure laser, it was known that the suitable compositions x and y in Pb1−x(Ca1−ySry)xS as a cladding layer, which is lattice match to PbS as an active layer, can be easily chosen in the solubility range.
