Raman spectrum of Cu2CdSnSe4 stannite structure semiconductor compound. (December 2015)

• Record Type: Journal Article
• Authors: Rincón, C.; Quintero, M.; Moreno, E.; Power, Ch.; Quintero, E.; Henao, J.A.; Macías, M.A.
• Is Part Of: Superlattices and microstructures. Volume 88(2015)
• Page Start: 99
• Page End: 103
• Publication Date: 2015-12
• Subjects: Semiconductors -- Quaternary compounds -- Lattice dynamics -- Raman spectroscopy -- Phonons; Superlattices as materials -- Periodicals; Microstructure -- Periodicals; Semiconductors -- Periodicals; Superréseaux -- Périodiques; Microstructure (Physique) -- Périodiques; Semiconducteurs -- Périodiques; 621.38152
• DOI: 10.1016/j.spmi.2015.08.032
• Languages: English
• ISSNs: 0749-6036

Abstract

Abstract: Raman spectrum of Cu2 CdSnSe4 quaternary semiconductor compounds with tetragonal stannite-type structure (space group I 4 ¯ 2 m ), a material which has been recognized recently as a potential candidate for thermoelectric applications, has been studied. Most of the fourteen Raman lines expected for this compound according to group theory analysis were observed in the spectrum. Besides to the two strongest A 1 -symmetry stannite modes at 172 and 192 cm −1 originated from the motion of Se anion around the Cu and Sn cations which remain at rest, the leftover observed Raman lines were tentatively assigned to specific eigenmodes of the stannite crystal structure by comparing these line frequencies with those obtained for this compound from IR measurements as well as with those calculated Raman modes for the Cu2 ZnSnSe4 stannite-compound reported in the literature. Two spurious Raman lines related to the presence in this compound of SnSe and SnSe2 minority secondary phases have also been found in the Raman spectrum. Highlights: Room temperature Raman spectrum of Cu2 CdSnSe4 stannite-structure is studied. The main A 1 -stannite modes are observed at 172 and 192 cm −1 . Symmetry assignment of fourteen Raman lines observed to stannite eigenmodes is done. Raman lines of SnSe and SnSe2 minority secondary phases are observed in the spectrum.