Mn-activated K2ZrF6 and Na2ZrF6 phosphors: Sharp red and oscillatory blue-green emissions
Mn-activated K2ZrF6 and Na2ZrF6 phosphors: Sharp red and oscillatory blue-green emissions
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DOI：
10.1063/1.4732139
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发表时间：
2012-07
影响因子：
3.2
通讯作者：
R. Kasa;S. Adachi
中科院分区：
文献类型：
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作者：
R. Kasa;S. Adachi
采用化学反应法在HF基溶液中合成了Mn激活的A2ZrF6（A = K，Na）荧光粉。Mn激活的K2ZrF6磷光体在λ 630 nm处表现出尖锐的红色发射峰，这通常在各种Mn 4+激活的磷光体中观察到。因此，磷光体被鉴定为K2ZrF6：Mn 4+。另一方面，Mn激活的Na2ZrF6磷光体显示出宽的蓝绿色发射带，峰值在520 nm处，同时表现出振荡特征。该发射带被认为是源自Na2ZrF6的Na+−Na+位中的Mn2+离子。对于磷光体，这种振荡特征先前没有报道。傅里叶变换分析产生的主振荡周期为10.10 eV连同10.26 meV的次级振荡周期。虽然起源的振荡功能在Na2ZrF6：Mn2+是不清楚的，它似乎是由Mn2+诱导的应变在Na2ZrF6主机的效果。Na2ZrF6：Mn2+的这种独特的发光性能不仅具有重要的技术意义，而且具有广阔的应用前景。
Mn-activated A2ZrF6 (A = K, Na) phosphors are synthesized by the chemical reaction method in HF-based solutions. The Mn-activated K2ZrF6 phosphor exhibits sharp red emission peaks at ∼630 nm, which are typically observed in various Mn4+-activated phosphors. The phosphor is, therefore, identified to be K2ZrF6:Mn4+. The Mn-activated Na2ZrF6 phosphor, on the other hand, shows a broad blue-green emission band with a peak at ∼520 nm while exhibiting an oscillatory feature. This emission band is considered to originate from the Mn2+ ion in the Na+−Na+ site of Na2ZrF6. Such an oscillatory feature has not been previously reported for phosphors. Fourier transform analysis yields a main oscillatory period of ∼0.10 eV together with a secondary oscillatory period of ∼26 meV. Although the origin of the oscillatory feature in Na2ZrF6:Mn2+ is unclear, it appears to be caused by an effect of the Mn2+-induced strain in the Na2ZrF6 host. Such unique luminescence properties of Na2ZrF6:Mn2+ are not only of technological impo...