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首页> 外文期刊>Applied Surface Science >Synthesis of three-dimensional flower-like BiOCl:RE3+ (RE3+ = Eu3+, Sm3+) globular microarchitectures and their luminescence properties
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Synthesis of three-dimensional flower-like BiOCl:RE3+ (RE3+ = Eu3+, Sm3+) globular microarchitectures and their luminescence properties

机译：三维花状BiOCl：RE3 +（RE3 + = Eu3 +，Sm3 +）球形微结构的合成及其发光特性

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摘要

Three-dimensional flower-like Eu3+ and Sm3+-activated BiOCl globular microarchitectures were synthesized by the solvothermal method employing urea as a dispersing agent for the first time. The crystal structure, morphologies and luminescence properties of Eu3+ and Sm3+ doped BiOCl have been systematically investigated by powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) and spectroscopy, respectively. The unit cell volumes show a nearly linear decrease by about 0.18 and 0.15% with increasing Eu3+ and Sm3+ concentration up to 9 mol%, respectively. All of the prepared samples show flower-like globular microarchitectures with an average diameter about 3-5 mu m with different Eu3+ and Sm3+ concentrations. Possible formation mechanism for the flower-like microarchitectures is proposed on the basis of time-dependent experiment. Both BiOCl:Eu3+ and BiOCl:Sm3+ samples show a strong red emission corresponding to the (D0 -> F4)-D-5-F-7 transition (700 nm) of Eu3+ and (4)G(5/2)-> H-6(7/2) transition (600 nm) of Sm3+, respectively. This work sheds some light on the design and preparation of red-emitting phosphors with novel microstructures. (C) 2015 Elsevier B.V. All rights reserved.
机译：首次以尿素为分散剂，通过溶剂热法合成了三维花状Eu3 +和Sm3 +活化的BiOCl球状微结构。分别通过粉末X射线衍射（XRD）和扫描电子显微镜（SEM）和光谱学系统地研究了Eu3 +和Sm3 +掺杂的BiOCl的晶体结构，形貌和发光性能。随着Eu3 +和Sm3 +浓度分别增加至9 mol％，单位晶胞体积显示出近乎线性的下降，分别降低了约0.18和0.15％。所有制备的样品均显示出花状球状微结构，其平均直径约为3-5μm，且Eu3 +和Sm3 +的浓度不同。在时变实验的基础上，提出了花状微结构的可能形成机理。 BiOCl：Eu3 +和BiOCl：Sm3 +样品均显示出强红色发射，对应于Eu3 +和（4）G（5/2）->的（D0-> F4）-D-5-F-7跃迁（700 nm）。 Sm3 +的H-6（7/2）跃迁（600 nm）。这项工作为具有新型微观结构的红色发光磷光体的设计和制备提供了一些启示。 （C）2015 Elsevier B.V.保留所有权利。

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