Abstract
We present the Raman and photoluminescence (PL) spectra of CuGaS2:Cd grown by iodine transport method. The PL spectra of CuGaS2 showed both band gap and deep center emission, while for CuGaS2:Cd the deep center emission was suppressed completely and a new strong emission at 2.31 eV with an activation energy of 97 meV appeared. The pressure dependence of the Raman spectra in CuGaS2:Cd has been measured up to about 8 GPa at room temperature. At above 1.76 GPa, the Γ1 mode splits into two with frequencies of 313 and 315 cm—1 (Γ1) in which the mode Gr�neisen parameters are 1.50 and 1.47, respectively. The additional peak is considered by the localized phonon resulting from the cation Cd.
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