Concentration Quenching of Luminescence from the2P3/2 Level of Er3+ Ion in Y3Al5O12 and YAlO3 Crystals

Upconversion dynamics in Er3+ doped nanocrystalline YAlO3

“…Furthermore, electron-phonon coupling can bridge energy gaps of several hundreds of cm −1 , giving rise to phonon-assisted transfer of energy among Er 3+ ions. These factors, together with many others (like pumping regime, excitation wavelength and power density, dopant concentration, temperature and radiative lifetimes of the Er 3+ excited states) give rise to the complex dynamics of the upconversion emissions observed in bulk crystals [1][2][3][4][5][6][7][8] and nanocrystallites [9][10][11] doped with Er 3+ .…”

Vacuum ultraviolet spectra and crystal field analysis ofYAlO3doped withNd3+andDuan1, Tanner2, Makhov3 et al. 2007Phys. Rev. B450310View full textAdd to dashboardCite

“…3͑b͒, but it is clear that other luminescent states 4 S 3/2 , 4 F 9/2 , 4 I 9/2 , 4 I 11/2 are also populated due to nonradiative decay processes from 2 P 3/2 including cross-relaxation. 25 The 2 P 3/2 radiative intensity branching ratios to terminal multi- Emission intensity (counts/channel) plets are in agreement with the calculations of Kaminskii et al 14 The fine structure in the survey spectrum as presented in Fig. 3͑b͒ is not evident, but a detailed analysis in an enlarged scale provides an energy level dataset which is in agreement with the literature energy levels.…”

“…23,24 The luminescence from the higher multiplet term 2 P 3/2 is concentration quenched. 25 Indeed, such cross-relaxation processes are ubiquitous for Er 3+ in YAlO 3 and are effective in upconversion 26,27 in addition to excited state absorption 28 and photon avalanche 29 processes. Pumping at 1500 nm can provide green and red emission bands.…”

Synthesis, Crystal Structures, and Optical and Magnetic Properties of Samarium, Terbium, and Erbium Coordination Entities Containing Mono-Substituted Imine Silsesquioxane Ligands

“…This proves the lack of energy transfer between the lanthanide ions and the ligand in these species. It is worth mentioning that none of the excitation lines typical of the Er 3+ ( 3 ) produced no luminescence from this rare earth ion, in neither the visible (VIS) range nor the infrared (NIR) range, probably due to strong non-radiative processes . However, further detailed analysis is needed to investigate the nature of this luminescence quenching thoroughly.…”

“…It is worth mentioning that none of the excitation lines typical of the Er 3+ (3) produced no luminescence from this rare earth ion, in neither the visible (VIS) range nor the infrared (NIR) range, probably due to strong non-radiative processes. 49 However, further detailed analysis is needed to investigate the nature of this luminescence quenching thoroughly. Figure 5a demonstrates the emission spectrum of 4 recorded under 375 nm excitation at 300 K. It can be seen that the sample shows four narrow spectral lines in the range of 480−630 nm, characteristic for Tb 3+ ions.…”