Enhancement of red upconversion emission intensity of Ho3+ ions in NaLuF4:Yb3+/Ho3+/Ce3+@NaLuF4 core-shell nanoparticles

作者:Wei Gao; Xiaotong Cheng; Yu Xing; Shanshan Han; Binhui Chen; Qingyan Han; Xuewen Yan; Jihong Liu; Lin Liu; Jun Dong
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The red upconversion emission of Ho3+ions作为生物组织的光学窗口,在生物应用方面展现了良好的前景。本研究旨在通过引入Yb3+andYb3+/Nd3+ions into theNaLuF4shell,增强Ho3+ions in NaLuF4大学:20%Yb3+/2%Ho3+/12%Ce3+nanoparticles through building different core-shell structures with different excitation wavelengths.A significantly enhanced red upconversion emission with a higher red-to-green ratio was successfully obtained in NaLuF4大学:20%Yb3+/2%Ho3+/12%Ce3+,naluf4核壳纳米颗粒的红色转换发射强度,随着壳中的Yb3+-and-Nd3+离子向Ho3+ions.Investigation of the red emission enhancement mechanism is based on spectral characteristics and lifetimes.We examined the synergistic effect of dual-wavelength co-excitation NaLuF4转移更多激发能时出现的红光发射增强:20%Yb3+/2%Ho3+/12%Ce3+@NaLuF4:10%Yb3+/15%Nd3+core-壳纳米颗粒,以建立最佳激发条件。预计这种方法,使用具有多模激发的红色上转换发射核壳纳米颗粒,可以 提供 新 方式 到 扩大 这个 应用 属于 稀土 发光的 材料 在里面 生物医学 和 防伪。