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首页> 外文期刊>Bulletin of the Chemical Society of Japan >Photoluminescent Properties and Local Structure of Tb Doped Fibrous Alumina
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Photoluminescent Properties and Local Structure of Tb Doped Fibrous Alumina

机译：TB掺杂纤维氧化铝的光致发光性能和局部结构

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摘要

A boehmite sol which contains uniform fibrous nanoparticles has a unique property to form a film by its self-assembling properties. When Tb ions were added to the sol, the film became photoluminescent (PL) and emitted bright green light due to the f-f transition of Tb by UV irradiation. The PL intensity varied with calcination temperature during pretreatment. The best performance was obtained when the sample was treated around 800 degrees C. The PL performance normalized by the Tb content was higher for samples with a lower Tb content. Structural analysis by TEM, XRD, and XAFS revealed that when the Tb content was lower than Tb/Al = 2.5/97.5 in the atomic ratio, Tb ions were dispersed on the alumina surface isolated from each other, and those Tb species showed a high PL performance. On the other hand, for densely Tb doped samples, excessive Tb ions aggregated and formed Tb oxide nanoparticles, which were supposed to have lower PL efficiencies.
机译：含有均匀纤维纳米颗粒的Boehmite溶胶具有独特的性质，以通过其自组装性能形成膜。 当将Tb离子加入到溶胶中时，由于Tb的F-F通过紫外线照射，薄膜成为光致发光（PL）和发射的亮绿光。 在预处理期间，PL强度随煅烧温度而变化。 当样品被处理约800℃时，获得了最佳性能。通过TB含量标准化的PL性能对于具有较低Tb含量的样品较高。 TEM，XRD和XAF的结构分析显示，当TB含量低于TB / Al = 2.5 / 97.5时，将Tb离子分散在彼此分离的氧化铝表面上，并且那些TB物种显示出高 PL表现。 另一方面，对于密集的Tb掺杂样品，过量的Tb离子聚集和形成的Tb氧化物纳米颗粒，其应该具有较低的Pl效率。

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