Abstract
Sb2Se3 has attracted a lot of research interest as an environmentally friendly material with diverse applications. (Sb2Se3)100−xBix(x = 0, 0.2, 0.4, 0.6, 0.8, 1.0, 1.2) alloys are synthesized via melt quenching. Energy Dispersive X-ray (EDX) spectra confirm the Sb, Se, and Bi presence in bulk samples. X-ray diffraction (XRD) spectra confirm orthorhombic crystal structure in Bi-doped Sb2Se3 alloys. FTIR and Raman spectroscopy observations indicate an alteration in local structure on Bi addition. Far-IR spectroscopy points to Bi bonding with Se forming Bi2Se3 units. There is shifting of Raman peaks, corroborating the structural alteration in alloys on Bi incorporation. The peak intensity of Raman modes for Sb–Sb bond (B1g mode) decreases and for Sb–Se bond (A1g mode) increases, due to formation of Bi2Se3 structural units on Bi incorporation. The formation of stable Bi2Se3 units on Bi addition to Sb2Se3 alloys may be explored for potential application in topological insulators.
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