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

doi:10.1021/jacs.5b12788

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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177 Scopus citations

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 language	English
Pages (from-to)	1158-1161
Number of pages	4
Journal	Journal of the American Chemical Society
Volume	138
Issue number	4
DOIs	https://doi.org/10.1021/jacs.5b12788
State	Published - Feb 3 2016

Funding

Work performed by Z.X. and Q.L. was supported by the National Natural Science Foundation of China (51272242 and 51572023), the Program for New Century Excellent Talents in the University of the Ministry of Education of China (NCET-12-0950), and the Beijing Nova Program (Z131103000413047). Work performed by G.L., J.W., Z.M., M.B., and D.J.M. at Argonne National Laboratory was supported by the Office of Basic Energy Sciences of the U.S. Department of Energy (DOE) through Grant DE-AC02-06CH11357 for research on heavyelements chemistry and materials sciences. TEM was accomplished in part at the Center for Nanoscale Materials, a DOE Office of Science User Facility under Contract DE-AC02-06CH11357. Sector 20 operations at APS are supported by DOE and the Canadian Light Source, with additional support from the University of Washington. G.L. acknowledges travel support from the CAS/SAFEA International Partnership Program for Creative Research Teams. K.R.P. gratefully acknowledges support from the National Science Foundation (DMR-1307698).

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

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.",

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AU - Xia, Zhiguo

AU - Liu, Guokui

AU - Wen, Jianguo

AU - Mei, Zhigang

AU - Balasubramanian, Mahalingam

AU - Molokeev, Maxim S.

AU - Peng, Licong

AU - Gu, Lin

AU - Miller, Dean J.

AU - Liu, Quanlin

AU - Poeppelmeier, Kenneth R.

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AB - 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.

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Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)_x(NaSc)_1-xSi₂O₆ Solid Solution

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