Non-vibrational features in NIR FT-Raman spectra of lanthanide sesquioxides

Raman and Fluorescence Spectroscopy of CeO2, Er2O3, Nd2O3, Tm2O3, Yb2O3, La2O3, and Tb4O7

“…These emissions have not been reported in the literature. The general agreement is that Yb 3+ has a simple energy diagram consisting of three crystal field levels in the excited 2F 5/2 manifold and four in the 2F 7/2 ground state manifold [3,24]. The transition between these two states is corresponding to the 980 nm emission.…”

“…Bilijan also reported broad ranges of Raman bands from 1000 cm −1 to 2000 cm −1 (1090 1140, 1303, 1377, 1593, and 1814 at cm −1 ) and 3000 cm −1 to 3500 cm −1 (3217 and 3417 at cm −1 ) using 1064 nm excitation [3]. These bands correspond to 1190 nm to 1351 nm and 1562 nm to 1695 nm for the emission spectra when using 1064 nm excitation.…”

Synthesis and characterization of spherical and rod like nanocrystalline Nd2O3 phosphors

“…It is observed that in combustion synthesized sample, Raman peaks are broader and shifted to higher wave number side by about 9 nm when compared to hydrothermal synthesized sample. This frequency shift and broadening of Raman peaks might be attributed to decrease in particle size to nanometer scale [25]. Further, it is observed that the number of active Raman modes is less in hydrothermal method when compared to combustion method.…”

Raman characterisation of powder of cubic RE2O3 (RE=Nd, Gd, Dy, Tm, and Lu), Sc2O3 and Y2O3

“…this structure, the C-type series offers the possibility of pursuing a systematic study on the effect of the cell parameter and the cationic mass variation on the Raman spectra. Unfortunately, the spectra of same RE 2 O 3 are often very complex, depending on the laser wave length, because of the presence of signals due not only to the Raman scattering, but also to the photoluminescence of the RE ions [18][19][20]. In these cases, the spectrum seems to be very different from those of the other C-type oxides and it can be difficult to make a comparison.…”