Luminescent Performance of the Long-Persistence Sr2MgSi2O7: Eu2+, Dy3+ Inorganic Nanofibers
Luminescent Performance of the Long-Persistence Sr2MgSi2O7: Eu2+, Dy3+ Inorganic Nanofibers
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DOI：
10.1149/2.0031509jss
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发表时间：
2015
影响因子：
2.2
通讯作者：
C. Zhi;Jun Luo;M. Ge
中科院分区：
文献类型：
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作者：
C. Zhi;Jun Luo;M. Ge
采用静电纺丝技术结合煅烧法成功制备了稀土掺杂长余辉硅酸盐发光纳米纤维(Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+),并采用溶胶-凝胶法制备了与纳米纤维相同化学计量比的长余辉硅酸盐荧光粉(Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+)。研究了纳米纤维与荧光粉的形貌、晶体结构、光致发光和热致发光性能。 Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ 发光纳米纤维的平均直径为350 nm，纳米纤维整体形状连续，呈珍珠项链状。 Sr 2 MgSi 2 O 7 :Eu 2+ ,Dy 3+ 发光纳米纤维的合成温度为1100℃，比荧光粉低200℃。与荧光粉相比，纳米纤维的激发光谱向短波长方向移动，在365 nm紫外光激发下，纳米纤维可以发出明亮的蓝光。纳米纤维的初始余辉强度为1.26 cd·m− 2，其余辉衰减曲线与荧光粉相似。尽管发光纳米纤维的陷阱深度比荧光粉浅，但纳米纤维仍然表现出较强的余辉强度和较长的衰减时间。
Long-persistence silicate luminescent nanofibers doped with rare earths (Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+) were successfully prepared via electrospinning technique combined with calcination method, and long-lasting silicate phosphors (Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+) with the same stoichiometric proportion as the nanofibers were prepared by sol-gel method. The morphology, crystal structure, photoluminescence and thermoluminescence properties of the nanofibers compared with the phosphors were investigated. The average diameter of the Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+ luminescent nanofibers was 350 nm, and the whole shape of the nanofibers was consecutive which seemed like pearl necklace. The synthesis temperature of the Sr 2 MgSi 2 O 7: Eu 2+, Dy 3+ luminescent nanofibers was 1100 C which lower 200 C than phosphors. The excitation spectrum of the nanofibers moved to short wavelength direction compared with the phosphors, and the nanofibers could reveal a bright blue light after been excited by UV light at 365 nm. The initial afterglow intensity of the nanofibers was 1.26 cd· m− 2, and the afterglow decay curve of the nanofibers was similar to phosphors. Even though the depth of the traps of the luminescent nanofibers was shallower than phosphors, the nanofibers still presented strong afterglow intensity and long decay time.