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      Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)(x)(NaSc)(1-x)Si2O6 Solid Solution.

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          Abstract

          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-xSi2O6 (0 < x < 1) in which cation nanosegregation leads to the presence of two dilute Eu(2+) centers. The distinct nanodomains of isostructural (CaMg)Si2O6 and (NaSc)Si2O6 contain a proportional number of Eu(2+) 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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          Author and article information

          Journal
          J. Am. Chem. Soc.
          Journal of the American Chemical Society
          American Chemical Society (ACS)
          1520-5126
          0002-7863
          Feb 03 2016
          : 138
          : 4
          Affiliations
          [1 ] The Beijing Municipal Key Laboratory of New Energy Materials and Technologies, School of Materials Sciences and Engineering, University of Science and Technology Beijing , Beijing 100083, China.
          [2 ] Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS , Krasnoyarsk 660036, Russia.
          [3 ] Department of Physics, Far Eastern State Transport University , Khabarovsk 680021, Russia.
          [4 ] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China.
          [5 ] Department of Chemistry, Northwestern University , 2145 Sheridan Road, Evanston, Illinois 60208, United States.
          Article
          10.1021/jacs.5b12788
          26771260

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