Luminescence spectra of Pr3+ in 15 titanate and vanadate lattices have been measured under LW excitation. They are characterized by a dominant red luminescence assigned to transitions from the D-1(2) level to the ground state. The quenching of the otherwise prominent blue luminescence from P-3(0) state is ascribed to a relaxation pathway involving a low-lying Pr3+-Mn+ (Mn+ = Ti4+ or V5+) intervalence charge transfer (IVCT) state. Complete quenching of the P-3(0) emission takes place when the IVCT bands are located in the 2650028 000 cm(-1) range and the shortest Pr3+-Mn+ distances are in the 3.15-3.30 angstrom range

Luminescence properties of Pr3+ in titanates and vanadates: Towards a criterion to predict 3P0 emission quenching

BETTINELLI, Marco Giovanni
2006-01-01

Abstract

Luminescence spectra of Pr3+ in 15 titanate and vanadate lattices have been measured under LW excitation. They are characterized by a dominant red luminescence assigned to transitions from the D-1(2) level to the ground state. The quenching of the otherwise prominent blue luminescence from P-3(0) state is ascribed to a relaxation pathway involving a low-lying Pr3+-Mn+ (Mn+ = Ti4+ or V5+) intervalence charge transfer (IVCT) state. Complete quenching of the P-3(0) emission takes place when the IVCT bands are located in the 2650028 000 cm(-1) range and the shortest Pr3+-Mn+ distances are in the 3.15-3.30 angstrom range
ELECTRON DIFFERENCE DENSITY; STRUCTURAL PARAMETERS; STRUCTURE REFINEMENTS
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11562/305050
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