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Luminescence of Sb/sup 3 +/ in rare earth orthoborates LnBO/sub 3/ (Ln = Sc, Y, La, Gd, Lu)

Journal Article · · J. Solid State Chem.; (United States)
; ; ;

The luminescence of several Sb/sup 3 +/-activated rare earth orthoborates (LnBO/sub 3/-Sb/sup 3 +/; Ln = Sc, Y, La, Gd, Lu) are reported. In all compositions the Stokes shift of the Sb/sup 3 +/ luminescence is rather large, resulting in rather low quenching temperatures (200 K or lower). The Stokes shift appears to be dependent on the coordination number and on the radius of the host lattice cation. This is explained from the assumed tendency of the Sb/sup 3 +/ ion to occupy an off-center position which becomes more apparent when the space available for the Sb/sup 3 +/ ion increases. The present results are compared with those on LnBO/sub 3/-Bi/sup 3 +/. It appears that the Stokes shift of the Bi/sup 3 +/ luminescence is more sensitive to the host lattice and is smaller than the Stokes shift of the Sb/sup 3 +/ luminescence. This is explained by the large radius of the Bi/sup 3 +/ ion compared to the Sb/sup 3 +/ ion. In GdBO/sub 3/-Sb/sup 3 +/ thermally activated energy transfer is observed from Gd/sup 3 +/ to Sb/sup 3 +/.

Research Organization:
State Univ., Ultrecht, Netherlands
OSTI ID:
7202261
Journal Information:
J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 65:2; ISSN JSSCB
Country of Publication:
United States
Language:
English

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Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400500* -- Photochemistry
ANTIMONY COMPOUNDS
BORATES
BORON COMPOUNDS
COHERENT SCATTERING
DATA
DIFFRACTION
EMISSION SPECTROSCOPY
EXPERIMENTAL DATA
FLUORESCENCE SPECTROSCOPY
GADOLINIUM COMPOUNDS
INFORMATION
LANTHANUM COMPOUNDS
LUTETIUM COMPOUNDS
NUMERICAL DATA
OXYGEN COMPOUNDS
RARE EARTH COMPOUNDS
SCANDIUM COMPOUNDS
SCATTERING
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION
YTTRIUM COMPOUNDS