Multiwavelength excitation Raman scattering study of Sb ₂ Se ₃ compound: fundamental vibrational properties and secondary phases detection

Abstract

This work presents a complete analysis of Raman active modes of Sb2Se3 measured by six different excitation wavelengths from NIR to UV, under different polarization configurations and at low temperature. Simultaneous fitting of spectra allowed the deconvolution and identification of the 28 Raman peaks obtained in monocrystalline Sb2Se3 sample from the 30 modes predicted by the group theory analysis for this crystalline structure. Analysis of the spectra measured under different polarization configurations yielded the preliminary assignment of the peaks symmetry, while the measurements under low temperature resulted in a fine resolution of the peaks in Raman spectra. Additionally, evaluation of the spectra of the most probable secondary phases under different excitation wavelengths allowed to define the most appropriate measurement conditions for experimental discrimination of their Raman peaks in the spectra of Sb2Se3 based thin films solar cells. The combination of different wavelength allows a non-destructive methodology for high sensitivity detection of main secondary phases of the Sb2Se3.

A New Family of Ultralow Loss Reversible Phase‐Change Materials for Photonic Integrated Circuits: Sb2S3 and Sb2Se3

“…The crystallized form of Sb 2 Se 3 gives rise to three A g ‐symmetry peaks at 117, 190, and 211 cm −1 and two B x g peaks at 150 and 153 cm −1 , all corresponding to Sb 2 Se 3. [ 52,56,57 ] Both materials crystallize in an orthorhombic structure, which is validated from the Raman modes.…”

Thin-film (Sb,Bi)2Se3 Semiconducting Layers with Tunable Band Gaps Below 1 eV for Photovoltaic Applications

“…The value extrapolated from Eq. (7) for pure Sb 2 Se 3 (179.8 cm −1 ) does not quite match the value for the mode that is identified at 185 cm −1 in single-crystal studies [37,38], but density-functional theory calculations [37] show that other modes are present in this frequency range, which can also, in principle, account for this difference. Our data do not allow us to conclude on a precise assignment for this mode.…”

A Novel Thermochemical Metal Halide Treatment for High-Performance Sb2Se3 Photocathodes

“…The corresponding Raman spectra of the pristine and treated films are shown in Figure 3 . The Raman spectrum of the pristine Sb 2 Se 3 film displays four prominent peaks at 99, 155, 191, and 213 cm −1 commonly assigned to the orthorhombic Sb 2 Se 3 phase [ 34 ] and the weak intensity band at 252 cm −1 attributed to the presence of trace amounts of antimony oxide ( Supplementary Figure S4 ) [ 35 , 36 ]. A distinguishable shift in the relative peak positions towards higher energies was detected for the films thermochemically treated in 50 and 150 mM SbCl 3 solutions ( Figure 3 ).…”