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We demonstrate Eu 2+ ion activated sorosilicate Ca 2 ZnSi 2 O 7 exhibits a broad emission band centered at 600nm due to Eu 2+ 4f 6 5d 1 →4f 7 transition, which is compatible for a blue light (∼450nm) excitation. Orbital symmetry of the emitting state and the tight coordination of 8 oxygen ions in its layered structure, which enhance covalency...
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