The Research Institute for Electric and Magnetic Materials, 2-1-1 Yagiyama-minami, Sendai 982-0807, Japan
Abstract:
We have investigated compositional plane of a wide band gap solid solution semiconductor Ca1?xCdxSe1?ySy (x0.32) using powder synthesis under thermal equilibrium condition. The solubility limit at 1273 K varies with respect to the Se concentration y, taking a minimum Cd solubility limit of 0.12 at y=0.8 and a maximum limit of 0.32 at y=1.0. It is found that the system can be lattice-matched to GaAs and InP under covering the energy band gap of ultraviolet–visible region. These results allow to design optoelectronic devices adopting the Ca1?xCdxSe1?ySy system.