The peculiar luminescent properties of incommensurately modulated structure of scheelites

What is it about?

The remarkable feature of the featured compounds, NaxEu(2-x)/3MoO4, is that the characteristic luminescence parameters, overall and intrinsic quantum yields, Eu(5D0) lifetimes, and sensitization efficiencies, correlate with the number of Eu3+ dimers, but not directly with the composition x of the materials. This provides an efficient tool for understanding and controlling the luminescence properties of scheelite related compounds

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Why is it important?

This study points to the importance of considering the superspace formalism without which no direct correlation could be found between composition and luminescent properties of the material. Once the superspace model is established, it is straightforward to explore all the configuration modes and deduce the structures with the largest number of Eu3+ dimers in order to maximize luminescence