Optical properties of peralkaline aluminosilicate glasses doped with Sm3+

The Structure of Gd3+-Doped Li2O and K2O Containing Aluminosilicate Glasses from Molecular Dynamics Simulations

“…The luminescence lifetime decreases with increasing network modifier oxide (NMO) concentration, i.e., with increasing molecular weight, density, and refractive index of the glass composition, in metaluminous glasses, i.e., where the molar concentration of NMO and Al 2 O 3 are equal, but increases with increasing NMO concentration in many, although not all, peralkaline glasses, i.e., where the molar concentration of NMO is higher than that of Al 2 O 3 . This effect has so far been observed for Sm 3+ , Eu 3+ , Dy 3+ and Tb 3+ doped glasses [10][11][12][13][14][15].…”

“…, denoted as 30Li and 30K, respectively. Since in experimental investigations very similar correlations of luminescence properties and the glass composition was observed irrespective of the rare earth ion used (Sm 3+ , Eu 3+ , Dy 3+ , Tb 3+ ) [10][11][12][13][14][15], Gd 3+ was chosen as model rare-earth ion because of its similar ionic radius (Sm 3+ (0.96 Å), Eu 3+ (0.95 Å), Gd 3+ (0.94 Å), Tb 3+ (0.92 Å), Dy 3+ (0.91 Å) [43]) and the available interatomic potential parameters. All structure models contain approximately 1 mol% Gd 2 O 3 .…”

“…This has been shown for Yb 3+ doped aluminosilicate glasses as compared to phosphate or fluoride phosphate glasses and even to monocrystalline CaF 2 [9]. Recently, a number of systematic studies on the compositional effects on the optical properties of Sm 3+ [10][11][12], Eu 3+ [12,13], Dy 3+ [14], Tb 3+ [15], Er 3+ [16], and Yb 3+ [9,17] doped aluminosilicate glasses were reported. It has been shown that in addition to the OH concentration, the base glass composition also has a great influence on the optical properties, such as luminescence lifetime and spectral shape of absorption and emission.…”

Crystallization of BaF2 from droplets of phase separated glass – evidence of a core–shell structure by ASAXS

“…This is much longer than those in silicate glasses, which usually show luminescence lifetimes of about 2-3 ms depending on their chemical composition. 28,32,33 For aluminosilicate glasses, fluorescence lifetimes are in the range of 2.2 to 3.8 ms, 28,29 while for tellurite glasses, 0.6 to 1.8 ms (ref. 32 Two conclusions can be drawn from these observations: firstly, the Sm 3+ ions are incorporated into a fluoride rich environment in the investigated samples, probably the fluoride rich droplets formed by phase separation.…”

Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB4O7

“…Recently, divalent samarium (Sm 2+ ) has been considered as a promising dopant for white-LED applications and for spectral hole burning [8]. Interestingly, trivalent samarium (Sm 3+ ) can constitute an emission component with high quantum efficiency arising from the emitting 4 G 5/2 4f 5 level [4,[9][10][11][12][13][14][15][16][17][18][19][20]. Overall, combining Sm( n+ ) activators in wide band gap materials can benefit the optical utilizations [21][22][23][24].…”