Color-tunable luminescence and temperature sensing properties of Bi/Sm or Bi/Eu codoped BaGdGeO phosphors.

Novel temperature-sensitive luminescent materials, BaGdGeO doped with Bi, Bi/Sm or Bi/Eu ions, have been prepared using a conventional solid-state reaction technique. The XRPD study has verified that all the synthesized germanates crystallize in the monoclinic system (space group 2/, = 4). The crystal lattice of the compounds consists of zigzag chains of edge-sharing MeO (Me = Bi, Eu or Sm) dimers, [GeO] units, and ten-coordinated Ba atoms.

Structural, electronic and optical properties of BaRE(GeO)(GeO) (RE = Tm, Yb, Lu) compounds and BaYb(GeO)(GeO):Tm and BaLu(GeO)(GeO):Yb,Tm phosphors: potential applications in temperature sensing.

A new series of BaRE(GeO)(GeO) (RE = Tm, Yb, Lu) germanates and activated phases BaYb(GeO)(GeO):Tm and BaLu(GeO)(GeO):12Yb,Tm have been prepared using a solid-state reaction. An XRPD study has revealed that the compounds crystallize in the monoclinic system (space group 2/, = 2). The crystal lattice consists of zigzag chains of edge-sharing distorted REO octahedra, bowed trigermanate [GeO] units, [GeO] groups, and eight-coordinated Ba atoms.

Structural and spectroscopic characterization of a new series of BaREGeO (RE = Pr, Nd, Gd, and Dy) and BaGdEuGeO tetragermanates.

A new series of BaREGeO (RE = Pr, Nd, Gd, Dy) germanates and BaGdEuGeO (x = 0.1-0.8) solid solutions have been synthesized using the solid-state reaction technique and characterized by X-ray powder diffraction.

Nd,Ho-Codoped apatite-related NaLa(GeO)O phosphors for the near- and middle-infrared region.

The apatite-like NaLa9(GeO4)6O2:Nd3+,Ho3+ phosphor is prepared using the solid-state method. Rietveld refinement of high-resolution time-of-flight neutron powder diffraction measurements indicate that this compound crystallizes in the hexagonal system with space group P63/m, Z = 1 and unit cell parameters a = 9.88903(6) Å, c = 7.