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Structural phase evolved Ni2+‐doped fluoride nanocrystals in KF−ZnF2−SiO2 glass‐ceramics
Journal of the American Ceramic Society ( IF 3.9 ) Pub Date : 2020-09-27 , DOI: 10.1111/jace.17504
Dashuang Ding 1, 2 , Yanlong Wang 1 , Changgui Lin 3 , Jing Ren 4 , Wenbo Shi 1 , Pengyuan Wang 1 , Bing Yang 5 , Shaoqian Zhang 1 , Liping Duo 1
Affiliation  

Incorporation of transition‐metal ions (TMIs) in the precipitated nanocrystals (NCs) of glass‐ceramics (GCs) greatly improves the photonic properties of these materials. The crystal field and coordination of TMIs show fingerprints for spectroscopic characterization. However, it is difficult to probe the effect of the host NCs’ structural phase on doped TMIs’ d‐d orbitals. Herein, ZnF2:Ni and KZnF3:Ni based on controllable crystallization in KF‐ZnF2‐SiO2:Ni2+ GCs were taken as model systems. Compared to ZnF2, perovskite‐type KZnF3 has higher binding energy Zn‐F bonds in which Ni2+ are easier to be segregated, which makes KZnF3:Ni be better “excited electron trapper” due to hole localization to intra‐gap Ni states. These findings contribute to the understanding and design of TMIs‐doped GCs in practical applications.

中文翻译:

在KF-ZnF2-SiO2玻璃陶瓷中结构相演化为掺杂Ni2 +的氟化物纳米晶体

在玻璃陶瓷(GC)的沉淀纳米晶体(NC)中掺入过渡金属离子(TMI)可以大大改善这些材料的光子性能。TMI的晶体场和配位显示出用于光谱表征的指纹。但是,很难探究宿主NC的结构相对掺杂TMI的d-d轨道的影响。在此,以在KF-ZnF 2 -SiO 2:Ni 2+ GC中可控结晶为基础的ZnF 2:Ni和KZnF 3:Ni被用作模型系统。与ZnF 2相比,钙钛矿型KZnF 3具有更高的结合能Zn-F键,其中Ni 2+更易于分离,这使得KZnF3:由于空穴位于间隙内Ni态,Ni更好地是“激发电子陷阱”。这些发现有助于在实际应用中理解和设计TMI掺杂的GC。
更新日期:2020-09-27
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