In-situ sol–gel synthesis of luminescent Mn2+-doped zinc silicate nanophosphor
In-situ sol–gel synthesis of luminescent Mn2+-doped zinc silicate nanophosphor
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DOI：
10.1007/s10854-016-4996-1
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发表时间：
2016-05
期刊：
影响因子：
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通讯作者：
K. Omri;L. El Mir
中科院分区：
文献类型：
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作者：
K. Omri;L. El Mir
采用溶胶-凝胶法原位合成了未掺杂和Mn 2+掺杂的硅酸锌（α-Zn 2SiO 4：Mn）纳米荧光粉。通过X射线衍射和透射电子显微镜对Mn掺杂和未掺杂的纳米荧光粉的微晶形貌进行了测定。在未掺杂的Zn 2SiO 4纳米荧光粉的情况下，具有约80 nm的平均颗粒尺寸的粉末在室温下在可见光范围内显示出以760 nm为中心的强发光带。此外，Zn 2SiO 4：Mn纳米荧光粉还发射出很强的绿色光（525 nm），这是由Mn 2+离子的4 T1 - 6A 1跃迁引起的。研究了Mn 2+离子掺杂Zn 2SiO 4纳米晶的发光光谱和激发态寿命。
Nanocrystalline undoped and Mn2+-doped zinc silicate (α-Zn2SiO4:Mn) nanophosphors were in situ prepared by a sol–gel technique. The crystallite morphology for Mn-doped and undoped nanophosphors have been determined by X-ray diffraction and transmission electron microscopy. In the case of undoped Zn2SiO4nanophosphors, the powder with an average particle size around 80 nm shows a strong luminescence band centred at 760 nm at room temperature in the visible range. In addition, Zn2SiO4:Mn nanophosphors emit very strong green luminescence (525 nm), which originated from the4T1–6A1transitions of Mn2+ions. The luminescence spectra and lifetime of the excited state of Mn2+ions-doped Zn2SiO4nanocrystals are investigated.