Spectroscopic properties, energy transfer and structural analysis of Sr2CeO4:M+ and Sr2CeO4:Eu3+, M+ (M+ = Li+, Na+, K+).

The room-temperature luminescent emission characteristics of Sr(2)CeO(4):M(+) and Sr(2)CeO(4):Eu(3+),M(+) (M(+) = Li(+), Na(+), K(+)) have been investigated under UV excitation. By introducing appropriate alkali metal cations dopants (Li(+), Na(+), K(+)) into the crystalline lattice, not only emission color of the blue-white-emitting Sr(2)CeO(4) doped with low Eu(3+) content can be tuned to green, but also the red emission intensity of Sr(2)CeO(4) doped with high Eu(3+) concentration is strengthened significantly. The relevant mechanisms have been elucidated in detail. © Springer Science+Business Media, LLC 2011