通过（CaMg）（x）（NaSc）（1-x）Si2O6 固溶体中的阳离子纳米分离来调谐光致发光。
Tuning of Photoluminescence by Cation Nanosegregation in the (CaMg)(x)(NaSc)(1-x)Si2O6 Solid Solution.
机构信息
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.
Laboratory of Crystal Physics, Kirensky Institute of Physics, SB RAS , Krasnoyarsk 660036, Russia.
出版信息
J Am Chem Soc. 2016 Feb 3;138(4):1158-61. doi: 10.1021/jacs.5b12788. Epub 2016 Jan 22.
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.
控制光致发光调谐对于优化和修饰荧光粉材料非常重要。在此，我们报告了一种同构固溶体 (CaMg)x(NaSc)1-xSi2O6（0 < x < 1），其中阳离子纳米分离导致存在两个稀有的 Eu(2+)中心。同构 (CaMg)Si2O6 和 (NaSc)Si2O6 的明显纳米域包含具有独特、独立光谱特征的比例数量的 Eu(2+)离子。密度泛函理论计算提供了对纳米分离的理论理解，并表明均匀固溶体在能量上是不稳定的。结果表明，纳米分离可以预测控制显色，因此为荧光粉的开发提供了一种新方法。
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