Structure and photoluminescence of Nd:Y2O3 grown by molecular beam epitaxy

Spectroscopic analysis on the basis Judd–Ofelt theory of Nd 3+ in (Y 0.985 Nd 0.015 ) 2 O 3 : A transparent laser-host ceramic

“…The higher doping concentration is expected to reduce the emission lifetime of the luminescent Nd 3+ ions and thus the laser efficiency, due to concentration quenching effects [15,16]. Recently, the effect of neodymium concentration on fluorescence and an emission lifetime of Nd 3+ transitions in Y 2 O 3 ceramics has been investigated [15,18,19]. It has been observed that the fluorescence intensity increases with neodymium concentration and show a maximum near 2 mol% doping level.…”

Cathodoluminescence and Raman Spectroscopic Analyses of Nd- or Yb-Doped Y2O3 Transparent Ceramics

“…Finally, it should be noted that, in the case of doping in the sesquioxide of yttrium with RE ions, an optimal content of dopant may exist because of the quenching effect due to cross-relaxation interactions between RE ions. For instance, for Nd doping, a content of around 1–2 at % Nd was found to show the highest emission intensity. , Because of its high-energy migration rates, trivalent ytterbium, especially at high concentrations, is also extremely sensitive to luminescence quenching. However, doping with the RE ions are not only limited to applications for laser materials since heavier doping and various growth methods could be involved in the fabrication.…”

“…However, doping with the RE ions are not only limited to applications for laser materials since heavier doping and various growth methods could be involved in the fabrication. Such different fabrication methods include growth of RE-crystalline yttrium oxide films on Si or sapphire substrates by molecular beam epitaxy in planar waveguide lasers, deposition of Yb–Y 2 O 3 thin films on sapphire for solar cell photon harvesting, and fabrication of nanosized RE-Y 2 O 3 polycrystalline solids for advanced phosphor applications. ,, The combined protocols of CL/Raman spectroscopy can be applied as a reliable and useful methodology for the examination of dopants in all such kinds of systems.…”

Nanostructure and luminescence properties of amorphous and crystalline ytterbium–yttrium oxide thin films obtained with pulsed reactive crossed-beam deposition

“…Yttria belongs to the body-centered cubic bixbyite structure with space group T h 7 (206) [9] and is thus optically isotropic; thus, ceramic processes can be employed to fabricate highly transparent samples in the polycrystalline phase using nanocrystalline powders and low-temperature treatments of the solid phase [10][11][12][13]. Thin film deposition techniques, such as laser ablation [14,15] or molecular beam epitaxy [16,17], can also be used with a substrate of high thermal conductivity, e.g., sapphire, to obtain power-scalable laser waveguides.…”