Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1497749 | Optical Materials | 2006 | 5 Pages |
Abstract
UV-excited red-emitting phosphors are obtained using Pr3+ as the luminescent activator and host lattices containing closed-shell transition metal ions (especially titanates, vanadates and niobates). In these oxidant lattices, the quenching of the otherwise greenish-blue emitting 3P0 level is induced by a low-lying Pr-to-metal intervalence charge transfer state (IVCT). A simple criterion based on the optical electronegativities of the d0 lattice cations (Mn+) and average Pr3+ − Mn+ distances is proposed to predict 3P0 quenching in these lattices.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Philippe Boutinaud, Eric Pinel, Mohamed Oubaha, Rachid Mahiou, Enrico Cavalli, Marco Bettinelli,