分散性
煅烧
发光
荧光粉
球体
离子
激活剂(遗传学)
材料科学
镧系元素
光子上转换
光致发光
晶体结构
降水
化学工程
纳米技术
化学
结晶学
物理
光电子学
催化作用
高分子化学
有机化学
天文
气象学
工程类
基因
生物化学
作者
Xiaomeng Jia,Kaihan Zhang,Quanying Kang,Guang Jia,Yan Yang,Rumeng Zuo,Cuimiao Zhang
标识
DOI:10.1016/j.jlumin.2022.119153
摘要
Uniform and well-defined Ln2O3 (Ln = Gd and Lu) hollow spheres have been fabricated via a hard template directed method with 3-aminophenol-formaldehyde (AF) resin as a template. During the synthesis procedure, the core-shell structured [email protected](OH)CO3 precursor spheres are firstly obtained via a homogeneous precipitation method. The final Ln2O3 hollow spheres are synthesized by a subsequent calcination treatment, which inherit the uniformity, dispersity, and morphology of the precursors and exhibit a reduction in diameter. The crystal structure, morphology, and formation process of the hollow spherical products have been systematically studied. After incorporating the proper lanthanide activator ions such as Eu3+, Yb3+/Er3+, or Yb3+/Ho3+ ions into the Gd2O3 and Lu2O3 host spheres, the as-synthesized luminescent hollow spheres can exhibit the characteristic downshift and upconversion emissions from different activator ions. The LED devices fabricated by the Gd2O3:Eu3+ and Lu2O3:Eu3+ phosphors and LED chip can show dazzling red emission light, which directly proves that the as-obtained phosphors may have prospects in fields of optoelectronic devices. Furthermore, the facile and general strategy may pave a critical way for the preparation of the hollow spherical rare earth oxides with well-defined structure and eminent physicochemical properties.
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