Spectroscopic properties of Y2BaZnO5:Er3+

Alternative crystal-field parameters for rare-earth ions obtained from various techniques: II. Reanalysis of spectroscopic data for Eu3+ and Er3+ ions in RE2BaXO5 (X=Co, Cu, Ni, Zn) high temperature superconductors and related systems

“…Importantly, among the CFP sets determined experimentally or theoretically for the ion-hosts under consideration [9][10][11][12][13][14][15][16][17], there occur both standard and non-standard sets (as defined in [6,7]). Such CFP sets belong to different areas of the multi-parameter space [6,7] and, for the reasons exposed in [1,3], they are intrinsically incomparable.…”

“…Concerning other spectroscopic studies of Er 3+ ions, luminescence study of Y 2 BaZnO 5 : Er 3+ [14] and Er 3+ in (Er 0.05 Y 0.95 ) 2 BaZnO 5 [15] may be mentioned. However, Cruz et al [14] provide in their Table 3 only the "refined parameter values", namely, four parameters ' g i ' (i = 1-4) and one parameter '2ˇ' for the two sites 1 and 2.…”

“…In this paper, utilizing the framework presented in [1,3], we reconsider the orthorhombic CFPs for Eu 3+ ions in Ln 2 BaZnO 5 (Ln = La, Nd, Y) and Eu 2 BaXO 5 (X = Co, Zn) [9][10][11][12] and Er 3+ ions in Y 2 BaZnO 5 and Er 2 BaXO 5 (X = Ni, Cu, Zn) [13][14][15][16][17]. For the reader's convenience, here we only briefly recap the major points concerning theoretical background and basic nomenclature, whereas for details the papers [1,3] may be consulted.…”

Studies on phase stability, mechanical, optical and electronic properties of a new Gd2CaZnO5 phosphor system for LEDs

“…4 For example, ternary oxides defined by R 2 AMO 5 with R = rare-earth, A = alkaline-earth and M = Cu or Zn atoms are found to have the desired luminescent properties for efficient color tunability. [5][6][7][8][9][10] This family of ternary oxides having large band gaps can serve as good luminescent hosts in accommodating rare-earth ions as dopants and thereby yielding effective luminescence with high quantum efficiency. There seems to be a dearth of information about the structural and fundamental properties of the R 2 AMO 5 oxides, though their luminescence properties have been well characterized.…”

“…1(b)). It consists of a three-dimensional array of face-and edge-sharing CaO 10 and GdO 8 polyhedra. The CaO 10 coordination polyhedron is a twisted square prism capped on both ends by tetragonal pyramids with the O atoms situated at the corners of the twisted cubic structure and the other O atoms at the top of the caps.…”