Rapid Production of Ln2O2S:Eu3+/Tb3+ (Ln = Sm, La, Gd, and Y) Phosphors by Molten Salt Electrolysis
Rapid Production of Ln2O2S:Eu3+/Tb3+ (Ln = Sm, La, Gd, and Y) Phosphors by Molten Salt Electrolysis
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DOI：
10.1021/acsaem.7b00304
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发表时间：
2018-02
期刊：
影响因子：
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通讯作者：
Yu-Hui Liu;X. Jing;Pu Wang;Tai-qi Yin;Debin Ji;Milin Zhang
中科院分区：
文献类型：
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作者：
Yu-Hui Liu;X. Jing;Pu Wang;Tai-qi Yin;Debin Ji;Milin Zhang
本文采用一锅法熔盐电解法合成了六方片状发光材料Ln_2O_2S：Eu ~（3+）/Tb ~（3+）（Ln = Sm，La，Gd和Y）。采用X射线粉末衍射（XRD）、高分辨透射电子显微镜（HRTEM）和光致发光等手段对荧光粉的物相、组成、形貌和光学性能进行了表征。结果表明，掺杂Eu ~（3+）或Tb ~（3+）对晶体结构没有明显的影响。在394 nm光的激发下，Ln 2 O2 S：Eu 3+（Ln = Sm，La，Gd，Y）在627 nm附近呈现出明显的红光发射，这对应于基质晶体的吸收和Eu 3+离子5D 0到7 F2的能级跃迁。在364 nm波长下，Ln 2 O2 S：Tb 3+呈现出片状结构，具有Tb 3+的特征激发。测量了Ln_2 O_2S：Tb ~（3+）（Ln = Sm，La，Gd，Y）的发射光谱，在450 ~ 650 nm之间的发射线对应于5D_4 ~ 7 F_J（J = 0-6）基跃迁。
In this paper, a facile one-pot molten salt electrolysis method has been proposed for the synthesis of hexagonal sheet-like Ln2O2S:Eu3+/Tb3+ (Ln = Sm, La, Gd and Y) phosphors. The phase, composition, morphology, and optical properties of the phosphors were characterized by X-ray powder diffraction (XRD), high-resolution transmission electron microscope (HRTEM), and photoluminescence. The results showed that doping Eu3+ or Tb3+ causes no great changes to the crystal structure. Under the excitation of 394 nm light, sheet-like Ln2O2S:Eu3+ (Ln = Sm, La, Gd, and Y) exhibited predominantly red emission at around 627 nm, which corresponds to the absorption of host crystals and the energy level transitions of 5D0 to 7F2 configuration of Eu3+ ions. The sheet-like Ln2O2S:Tb3+ exhibited characteristic excitation of Tb3+ under 364 nm. The emission spectra of Ln2O2S:Tb3+ (Ln = Sm, La, Gd, and Y) were measured, and those emission lines between 450 and 650 nm corresponded to the transitions of 5D4 to 7FJ (J = 0–6) groun...