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Synthesis, crystal structure and luminescence properties of a new samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2
Acta Crystallographica Section C ( IF 0.8 ) Pub Date : 2020-11-13 , DOI: 10.1107/s2053229620014576 Dan Zhao , Lin-Ying Shi , Rui-Juan Zhang , Ya-Li Xue
Acta Crystallographica Section C ( IF 0.8 ) Pub Date : 2020-11-13 , DOI: 10.1107/s2053229620014576 Dan Zhao , Lin-Ying Shi , Rui-Juan Zhang , Ya-Li Xue
A new caesium sodium samarium borate phosphate, CsNa2Sm2(BO3)(PO4)2, has been obtained successfully by the high‐temperature solution growth (HTSG) method and single‐crystal X‐ray diffraction analysis reveals that it crystallizes in the orthorhombic space group Cmcm. The structure contains BO3, PO4, NaO7 and SmO7 polyhedra which are interconnected via corner‐ or edge‐sharing O atoms to form a three‐dimensional [Na2Sm2(BO3)(PO4)2]∞ network. This network delimits large cavities where large Cs+ cations reside to form the total structure. Under 402 nm light excitation, CsNa2Sm2(BO3)(PO4)2 exhibits three emission bands due to the 4f→4f transitions of Sm3+. Furthermore, we introduced Gd3+ into Sm3+ sites to optimize the Sm3+ concentration and improve the luminescence intensity. The optimal concentration is Gd/Sm = 98/2. The luminescent lifetime of a series of CsNa2Gd2(1–x)Sm2x(BO3)(PO4)2 phosphors shows a gradual degradation of lifetime from 2.196 to 0.872 ms for x = 0.01–0.10. The Commission Internationale de l'Eclairage (CIE) 1931 calculation reveals that CsNa2Gd1.96Sm0.04(BO3)(PO4)2 can emit orange light under 402 nm excitation.
中文翻译:
新型硼酸sa磷酸盐CsNa2Sm2(BO3)(PO4)2的合成,晶体结构和发光性能
通过高温溶液生长(HTSG)方法成功地获得了一种新的硼酸铯钠硼酸铯CsNa 2 Sm 2(BO 3)(PO 4)2,并且单晶X射线衍射分析表明它已经结晶。在正交空间Cmcm中。该结构包含BO 3,PO 4,NaO 7和SmO 7多面体,它们通过共享角或边的O原子相互连接形成三维[Na 2 Sm 2(BO 3)(PO 4)2] ∞网络。该网络界定了大空腔,大的Cs +阳离子驻留在其中以形成整个结构。在402 nm光激发下,由于Sm 3+的4 f →4 f跃迁,CsNa 2 Sm 2(BO 3)(PO 4)2表现出三个发射带。此外,我们将Gd 3+引入Sm 3+位点,以优化Sm 3+浓度并提高发光强度。最佳浓度为Gd / Sm = 98/2。一系列CsNa 2 Gd 2(1– x的发光寿命)对于x = 0.01–0.10,Sm 2 x(BO 3)(PO 4)2荧光粉的寿命从2.196到0.872 ms逐渐降低。国际照明委员会(CIE)1931年的计算表明,CsNa 2 Gd 1.96 Sm 0.04(BO 3)(PO 4)2可以在402 nm激发下发出橙色光。
更新日期:2020-12-04
中文翻译:
新型硼酸sa磷酸盐CsNa2Sm2(BO3)(PO4)2的合成,晶体结构和发光性能
通过高温溶液生长(HTSG)方法成功地获得了一种新的硼酸铯钠硼酸铯CsNa 2 Sm 2(BO 3)(PO 4)2,并且单晶X射线衍射分析表明它已经结晶。在正交空间Cmcm中。该结构包含BO 3,PO 4,NaO 7和SmO 7多面体,它们通过共享角或边的O原子相互连接形成三维[Na 2 Sm 2(BO 3)(PO 4)2] ∞网络。该网络界定了大空腔,大的Cs +阳离子驻留在其中以形成整个结构。在402 nm光激发下,由于Sm 3+的4 f →4 f跃迁,CsNa 2 Sm 2(BO 3)(PO 4)2表现出三个发射带。此外,我们将Gd 3+引入Sm 3+位点,以优化Sm 3+浓度并提高发光强度。最佳浓度为Gd / Sm = 98/2。一系列CsNa 2 Gd 2(1– x的发光寿命)对于x = 0.01–0.10,Sm 2 x(BO 3)(PO 4)2荧光粉的寿命从2.196到0.872 ms逐渐降低。国际照明委员会(CIE)1931年的计算表明,CsNa 2 Gd 1.96 Sm 0.04(BO 3)(PO 4)2可以在402 nm激发下发出橙色光。