Luminescence and energy transfer in the columbite structure

Journal Article · Sun Sep 01 04:00:00 EDT 1985 · Mater. Res. Bull.; (United States)

DOI:https://doi.org/10.1016/0025-5408(85)90202-8· OSTI ID:6086054

Blasse, G; van Leur, M G.J.

The luminescence properties of undoped and Eu/sup 3 +/- and Dy/sup 3 +/doped CdNb/sub 2/O/sub 6/ and CaNb/sub 2/O/sub 6/ are reported and discussed in connection with the luminescence of niobates and tungstates with wolframite and columbite structure. It is shown that these structures lead in principle to highly efficient luminescent materials. However, disorder between the metal ions reduces the efficiency considerably. In CdNb/sub 2/O/sub 6/ the niobate excitation energy is more mobile than in CaNb/sub 2/O/sub 6/. This has important consequences for the rare-earth activated materials. At 300 K the amount of rare-earth emission from the CdNb/sub 2/O/sub 6/-based samples is high. This is due to energy migration in the host lattice and efficient transfer to the activator (R /SUB c/ approx. = 7A).

• OSTI ID: 6086054
• Journal Information: Mater. Res. Bull.; (United States), Journal Name: Mater. Res. Bull.; (United States) Vol. 20:9; ISSN MRBUA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACTIVATION ENERGY
ALKALINE EARTH METAL COMPOUNDS
CADMIUM COMPOUNDS
CALCIUM COMPOUNDS
CHARGED PARTICLES
CRYSTAL DOPING
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTALLOGRAPHY
DYSPROSIUM IONS
ENERGY
ENERGY TRANSFER
EUROPIUM IONS
ION IMPLANTATION
IONS
LUMINESCENCE
MEDIUM TEMPERATURE
MINERALS
NIOBATES
NIOBIUM COMPOUNDS
OXYGEN COMPOUNDS
REFRACTORY METAL COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TUNGSTATES