Up-conversion luminescence and Judd–Ofelt analysis of Nd₂O₃-doped yttria stabilized zirconia single crystals

Abstract

Transparent single crystals of (ZrO2)92(Y2O3)8-x(Nd2O3)x ( x=0.30, 0.50, 0.75, 1.00, 1.25, 1.50) were prepared by the optical floating zone method, and shown by XRD to have a cubic phase structure....

Mechanism for the long afterglow in Eu2O3 and Nd2O3 co-doped SrAl2O4 single crystals

“…However, the energies of the Eu 2+ emission and the Nd 3+ excitation peak have good overlap in the visible region, 24 and the absence of any emission from Nd 3+ with other excitation wavelengths supports the proposal for energy transfer from Eu 2+ to Nd 3+ . Energy transfer from Eu 2+ to Nd 3+ has also been reported by Tai et al , 24 and this conclusion is further supported by the absence of either absorption 25 or emission 26 associated with Nd 3+ at 421 nm. The PL spectra in the near infrared region consist mainly of three groups of emission peaks, which correspond to the Nd 3+ 4 F 3/2 → 4 I 9/2 (880/907 nm), 4 F 3/2 → 4 I 11/2 (1062/1114 nm) and 4 F 3/2 → 4 I 13/2 (1332 nm) transitions.…”

The role of terminal ligands in the slow relaxation of magnetisation and luminescence thermometry of dinuclear NdIII complexes

“…In other words, the band intensity is strongly dependent on the crystal field and Nd III local symmetry. 40 At least three band components in this spectral range are observed, whose relative intensities change depending on the Nd III complex, confirming that the different electron density distribution of the terminal ligands indeed changes the crystal field acting on Nd III . Moreover, different ligand electron densities can induce shifts in the energy of the M J sublevels, 41 although this effect is usually small due to the buried nature of 4f orbitals.…”

Luminescence properties of Eu2O3-doped ZrO2–Y2O3 single crystals

“…A more detailed description of the preparation procedures is presented in previous work. [4][5][6][7][8]26,27 We assume that the ratios of the elements in the crystals are the same as those in the starting mixtures, because the boiling points of each of the oxides are >1000 °C higher than the maximum temperature of the furnace during crystal synthesis. These are presented in tabular form in ESI † Table S1.…”