Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)x(NaSc)1-xSi2O6 Solid Solution

Zhiguo Xia, Guokui Liu, Jianguo Wen, Zhigang Mei, Mahalingam Balasubramanian, Maxim S. Molokeev, Licong Peng, Lin Gu, Dean J. Miller, Quanlin Liu, Kenneth R Poeppelmeier

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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 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.

Original languageEnglish
Pages (from-to)1158-1161
Number of pages4
JournalJournal of the American Chemical Society
Volume138
Issue number4
DOIs
Publication statusPublished - Feb 3 2016

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ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Xia, Z., Liu, G., Wen, J., Mei, Z., Balasubramanian, M., Molokeev, M. S., Peng, L., Gu, L., Miller, D. J., Liu, Q., & Poeppelmeier, K. R. (2016). Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)x(NaSc)1-xSi2O6 Solid Solution. Journal of the American Chemical Society, 138(4), 1158-1161. https://doi.org/10.1021/jacs.5b12788