A Study of Photoluminescence and Raman Scattering in CuGaS2:Cd

• Published in: physica status solidi (b) Vol. 223; no. 1; pp. 319 - 323
• Main Authors: Eom, S.H., Kim, S.C., Ahn, H.S., Yu, Y.S.
• Format: Journal Article
• Language: English
• Published: Berlin WILEY-VCH Verlag Berlin GmbH 01-01-2001; WILEY‐VCH Verlag Berlin GmbH
• Subjects: 78.30.Hv; 78.55.Hx; S8.11
• ISSN: 0370-1972; 1521-3951
• DOI: 10.1002/1521-3951(200101)223:1<319::AID-PSSB319>3.0.CO;2-R

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.