Raman spectroscopic study of In2S3 films prepared by spray pyrolysis

Methylene Blue Photocatalytic Degradation under Visible Irradiation on In2S3 Synthesized by Chemical Bath Deposition

“…Furthermore, band gap value indicates that catalyst can be active in the visible region of the electromagnetic spectrum; if semiconductor absorbs visible radiation it could be useful for degrading pollutant for using direct solar radiation [21,22]. Figure 3 shows modes obtained by Raman spectra for catalyst powder; definition and intensity of the signal in Raman spectra revealed high crystalline quality of catalyst; this result is according to XRD pattern diffraction; Raman spectra show five normal modes of vibration at 155 cm −1 , 186 cm −1 , 218 cm −1 , 243 cm −1 , and 305 cm −1 ; these signals can be assigned to modes of vibrations of In 2 S 3 phase; signals located at 186 cm −1 , 243 cm −1 , and 305 cm −1 can be assigned to A 1g vibration modes of In 2 S 3 phase; this result is according to other reports [23]. to beginning of photodegradation step is a process poorly studied; it is well known that the adsorption of contaminant species on the surface of the photocatalyst is an important step prior to degradation process.…”

Sulfurization-induced growth of single-crystalline high-mobility β-In2S3 films on InP

“…The constituent phases and structure of In 2 S 3 films were probed by Raman spectroscopy, with the positions of the observed prominent peaks (137.6, 163.3, 181.9, 246.9, 267.6, 304.4, 341.12, and 366.23 cm -1 (Fig. 4a)) being in close agreement with those previously obtained for tetragonal β-In 2 S 3 films (137, 164, 182, 247, 268, 309, 328, and 369 cm -1 ), 2,18,19 confirming that the prepared films comprised tetragonal β-In 2 S 3 . Prior studies reported that the direct and indirect bandgaps of β-In 2 S 3 films varied within the ranges of 1.9-2.75 and 1.98-2.2 eV, respectively.…”

Solid solutions of M2−2xIn2xS3 (M = Bi or Sb) by solventless thermolysis

“…52,56,57 The arrangements, residual stress, structural disorder or defects, all of which can affect the appearance of Raman-active phonon modes. 58…”