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Spectroscopic properties, energy transfer and structural analysis of Sr2CeO4:M+ and Sr2CeO4:Eu3+, M+ (M+ = Li+, Na+,
Li-Li Shi1, Cheng-Yu Li, Qiang Su
1State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People's Republic of China.
Abstract:
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.
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