Tuning Of Photoluminescence By Cation Nanosegregation In The (Camg)(X)(Nasc)(1-X)Si2o6 Solid Solution
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY(2016)
摘要
Controlled photoluminescence tuning is important for the optimization and modification of phosphor materials. Herein we report an isostructural solid solution of (CaMg)(x)(NaSc)(1-x)Si2O6 (0 < x < 1) in which cation nanosegregation leads to the presence of two dilute Eu2+ centers. The distinct nanodomains of isostructural (CaMg)Si2O6 and (NaSc)Si2O6 contain a proportional number of Eu2+ ions with unique, independent spectroscopic signatures. Density functional theory calculations provided a theoretical understanding of the nanosegregation and indicated that the homogeneous solid solution is energetically unstable. It is shown that nanosegregation allows predictive control of color rendering and therefore provides a new method of phosphor development.
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关键词
photoluminescence,cation nanosegregation
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