Luminescence of the Sb/sup 3 +/ ion in Ln(PO/sub 3/)/sub 3/ (Ln = Sc, Lu, Y, Gd, La)
The efficient luminescence of the 5s/sup 2/ ion Sb/sup 3 +/ in Ln(PO/sub 3/)/sub 3/ (Ln = Sc, Lu, Y, Gd, La) is reported. The compounds Ln(PO/sub 3/)/sub 3/ (Ln = Sc, Lu, Y, Gd) adopt the Yb(PO/sub 3/)/sub 3/ structure in which four slightly different octahedral sites are available for the trivalent cation, while La(PO/sub 3/)/sub 3/ has the Nd(PO/sub 3/)/sub 3/ structure in which only one position with eight coordination is available for the cation. The emission and excitation spectra of La(PO/sub 3/)/sub 3/-Sb/sup 3 +/ (Ln = Sc, Lu, Gd) show broad bands, caused by the strongly overlapping bands of the four Sb/sup 3 +/ centers. The spectra and decay time measurements show that the differences in luminescence of characteristics between the four Sb/sup 3 +/ centers become more apparent with decreasing radius of the host lattice cation. The luminescence properties of Y(PO/sub 3/)/sub 3/-Sb/sup 3 +/ are rather complex and lead to the conclusion that the relaxed excited state of some of the Sb/sup 3 +/ centers is distorted by a Jahn-Teller effect. The luminescence of La(PO/sub 3/)/sub 3/-Sb/sup 3 +/ originates from one Sb/sup 3 +/ center and can be described by usual models.
- Research Organization:
- State Univ. of Utrecht (Netherlands)
- OSTI ID:
- 6975216
- Journal Information:
- J. Solid State Chem.; (United States), Journal Name: J. Solid State Chem.; (United States) Vol. 73:1; ISSN JSSCB
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ALLOYS
ANTIMONY ADDITIONS
ANTIMONY ALLOYS
ANTIMONY COMPOUNDS
CATIONS
CHARGED PARTICLES
EMISSION SPECTROSCOPY
ENERGY LEVELS
EXCITED STATES
GADOLINIUM COMPOUNDS
GADOLINIUM PHOSPHATES
INCLUSIONS
IONS
LANTHANUM COMPOUNDS
LANTHANUM PHOSPHATES
LUMINESCENCE
LUTETIUM COMPOUNDS
LUTETIUM PHOSPHATES
OXYGEN COMPOUNDS
PHOSPHATES
PHOSPHORUS COMPOUNDS
PNICTIDES
RARE EARTH COMPOUNDS
SCANDIUM COMPOUNDS
SCANDIUM PHOSPHATES
SPECTROSCOPY
TRANSITION ELEMENT COMPOUNDS
YTTRIUM COMPOUNDS
YTTRIUM PHOSPHATES