Simultaneous tailoring of phase evolution and dopant distribution in the glassy phase for controllable luminescence.
Simultaneous tailoring of phase evolution and dopant distribution in the glassy phase for controllable luminescence.
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DOI：
10.1021/ja108512g
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发表时间：
2010-11
影响因子：
15
通讯作者：
Shifeng Zhou;N. Jiang;K. Miura;S. Tanabe;M. Shimizu;M. Sakakura;Y. Shimotsuma;M. Nishi;J. Qiu
中科院分区：
文献类型：
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作者：
Shifeng Zhou;N. Jiang;K. Miura;S. Tanabe;M. Shimizu;M. Sakakura;Y. Shimotsuma;M. Nishi;J. Qiu
构建具有多色可见光和宽带近红外发光的活性复合材料对于各种应用（包括三维（3D）显示、宽带电信和可调谐激光器）具有重要的技术重要性。主要挑战是有效管理复合材料中不同掺杂剂之间的能量转移。在这里，我们提出了一种原位策略，通过同时调整玻璃相中的相演化和掺杂剂分布来控制多个活性中心之间的能量转移。我们表明可以实现Ga(2)O(3)和LaF(3)纳米晶的有序沉淀以及Ni(2+)和Er(3+)的选择性掺入其中。获得的复合材料显示出独特的多色可见光和宽带近红外发射。基于全面的结构和光学表征以及晶体场计算结果，提出了选择性掺杂现象的可能机制。此外，该策略可以成功扩展，通过采用调制刺激场来实现多色发光的空间选择性控制。结果表明，该策略可用于制造具有多种重要主体/激活剂组合的多功能光源，并构建各种类型的三维活性微结构。
Construction of an active composite with multicolor visible and broadband near-infrared luminescence is of great technological importance for various applications, including three-dimensional (3D) display, broadband telecommunication, and tunable lasers. The major challenge is the effective management of energy transfer between different dopants in composite. Here we present an in situ strategy for controlling energy transfer between multiple active centers via simultaneous tailoring of the evolution of phases and the distribution of dopants in the glassy phase. We show that the orderly precipitation of Ga(2)O(3) and LaF(3) nanocrystals and the selective incorporation of Ni(2+) and Er(3+) into them can be achieved. The obtained composite shows unique multicolor visible and broadband near-infrared emission. Possible mechanisms for the selective doping phenomenon are proposed, based on thorough structural and optical characterizations and crystal-field calculation results. Moreover, the strategy can be successfully extended to accomplish space-selective control of multicolor luminescence by employing the modulated stimulation field. The results suggest that the strategy could be applied to fabricate a multifunctional light source with a broad range of important host/activator combinations and to construct various types of three-dimensional active microstructures.