abstract
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This work presents a two-step procedure to obtain thin films with a combination of CuSbS
2 and Cu12 Sb4 S13 phases for study in thermoelectric applications. The procedure consisted of the physical evaporation of sulfides layers (Sb2 S3 and CuS) on glass substrates and the subsequent annealing of the samples in a N2 atmosphere. The characterizations by Raman spectroscopy and XRD revealed that the samples presented a varied percentage of Cu12 Sb4 S13 and CuSbS2 . The results indicated that the percentage of phases depended on the initial thickness of the sulfide layers and the annealing temperature. The lower initial ratio between sulfide thicknesses and annealing temperature above 300 °C favored the formation of Cu12 Sb4 S13 . However, the thermoelectric properties were improved when the phases coexisted in the thin film compared to samples with high percentages of Cu12 Sb4 S13 . In this way, a sample with a power factor of 2.30 ¿W/cm¿ K2 at 60 ºC was identified. © 2023 Universidade Federal de Sao Carlos. All rights reserved.