Raman spectra of the chalcopyrite compound CuInTe2

Abstract

The lattice vibrational modes of the chalcopyrite compound CuInTe2 have been obtained at several temperatures by the unpolarized Raman spectra. Lines observed at 48, 74, 129, 138, 155, and 185 cm−1, identified with E modes, and at 60, 106, and 170 cm−1, assigned to B2 modes, agree quite well with the peaks reported from infrared reflectivity data. On the other hand, using the available theoretical models, the peaks that appear at 123 cm−1 and those observed around 65, 116, and 223 cm−1, which are only Raman active, are assigned to the A1 and B1 modes, respectively.

Low-temperature Heat Treatment (80°C) Effect on the Electrochemically Synthesized CuInTe2 Thin Films for Energy Harvesting Applications

“…The peaks observed in Raman spectra are in good agreement with the reported literature values [29]. In untreated samples, the broad hump from 100 cm -1 to 175 cm -1 is due to the mixing of 109 (B 2 ), 122 (A 1 ), 127(E), 141 (B 1 ), 159 (E) and 170 cm -1 (E and B 2 ) modes which is in good agreement with IR data [29]. The B 2 (109) mode is silent in the sample deposited at -0.7 V. Sharp peaks are observed upon annealing corresponds to A 1 , B 3 1 and combination of E and B 2 modes.…”

“…Figures 2a and 2b depicts the Raman spectra of pristine and heat treated CIT samples electrodeposited for potentials -0.7 V and -0.8 V, respectively. The peaks observed in Raman spectra are in good agreement with the reported literature values [29]. In untreated samples, the broad hump from 100 cm -1 to 175 cm -1 is due to the mixing of 109 (B 2 ), 122 (A 1 ), 127(E), 141 (B 1 ), 159 (E) and 170 cm -1 (E and B 2 ) modes which is in good agreement with IR data [29].…”

Raman Spectroscopy Study of Phonon Liquid Electron Crystal in Copper Deficient Superionic Thermoelectric Cu2–xTe

“…To assign the Raman modes for CT1.6, which is a mixture of tetragonal and trigonal structures, CuInTe 2 could provide better similarity . Cu 2 SnTe 3 crystallizes in orthorhombic structure, whereas CuInTe 2 has a tetragonal structure. , Similar to CuInTe 2 , the low frequency mode ∼ 41 cm –1 is observed in CT1.6 and can be assigned to E symmetry. Further, the modes ∼ 114 and 189 cm –1 are in close agreement with the modes observed in CuInTe 2 and assigned to B 1 and E symmetries, respectively.…”

Synthesis of CuInTe2 by Rapid Thermal Annealing of In/Cu/Te Stacked Elemental Layers

“…(4) is taken into account with the combined effects for other scattering mechanisms as given in Eqs. (10), (13) and (14).…”

“…This variation agreed well with theoretical considerations related to the distortion due to structural disorder caused by departure from stoichiometry in addition to the contribution from electron-phonon interaction. The lattice vibrational modes of the material were obtained by the same group at several temperatures from their studies on unpolarized Raman spectra [13].…”