Structural and optical properties in the V-doped II–VI diluted magnetic semiconductor Cd1−xVxTe

We report on the structural and the magnetic properties of ternary Cd1−xVxTe semiconductor alloys (0 ??? x ??? 0.05) grown by using the vertical Bridgman method. This material crystallizes in a zinc-blende structure at vanadium concentrations up to x = 0.05. Optical absorption spectra of Cd1−xVxTe were obtained in the range of 1.4–1.6 eV at temperatures between 20 and 300 K. The bandgap energy decreased with both increasing V content and increasing temperature. We have described the temperature dependence of the band gap Eg(T) on the basis of the electron-phonon interaction, thereby enabling us to obtain several important physical parameters of Cd1−xVxTe.ope