The excitation and emission properties of
Pr3+ and
Tb3+ ions doped
into YNbO4 (hereafter
YNB) and CaNb2O6
(hereafter CNB) have been studied as a function of the temperature in
the 10–600 K range. The observed quenching of the luminescence from the
3P0
(Pr3+)
and 5D3
(Tb3+) states has been related to an electron transfer process from the trivalent rare earth to the
Nb5+
ion inducing the formation of an intervalence charge transfer (IVCT) state. On this basis a
detailed picture of the excited-state dynamics of the investigated compounds is presented,
taking into account the characteristics of the host lattices and of the involved optically
active ions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.