Nd3+-Sensitized Ho3+ Single-Band Red Upconversion Luminescence in Core Shell Nanoarchitecture

被引：227

作者：

Chen, Daqin ^{[1
]}

Liu, Lu ^{[1
]}

Huang, Ping ^{[2
]}

Ding, Mingye ^{[1
]}

Zhong, Jiasong ^{[1
]}

Ji, Zhenguo ^{[1
]}

机构：

[1] Hangzhou Dianzi Univ, Coll Mat & Environm Engn, Hangzhou 310018, Zhejiang, Peoples R China

[2] Chinese Acad Sci, State Key Lab Struct Chem, Fujian Inst Res Struct Matter, Fuzhou 350002, Fujian, Peoples R China

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2015年 / 6卷 / 14期

基金：

中国国家自然科学基金;

关键词：

EFFICIENT; EMISSION; NANOPARTICLES; NANOMATERIALS; NANOCRYSTALS; FLUORESCENCE;

D O I：

10.1021/acs.jpclett.5b01180

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

A strategy to achieve 808 nm excited single-band red upconversion luminescence of Ho3+ via the core-shell nanoarchitecture design was provided. Specifically, the synthesized Yb/Ho/Ce: NaGdF4@Yb/Nd: NaYF4 active-core@active-shell nanoparticles were evidenced to enable high-content doping of Nd3+ (-40 mol %) in the shell layer and, thus, markedly enhance red upconversion emission from Ho3+ activators in the core with the assistance of spatially confined doping of Nd3+ ions and efficient energy transfer of Nd3+ -> Yb3+(shell) -> Yb3+(core) -> Ho3+. Importantly, introducing Ce3+ into the core was beneficial to the competition of radiation transitions from the two intermediate excited states of Ho3+: S-5(2), F-5(4) (green-emitting) and Ho3+: F-5(5) (red-emitting), which induced great enhancement in the red to green intensity ratio and ultimately intense single-band red upconversion emission. We believe that this preliminary study will provide an important advance in developing luminescent markers suitable for biolabeling applications.

引用

页码：2833 / 2840

页数：8

共 34 条

[1]

Structural and spectroscopic characterization of active sites in a family of light-emitting sodium lanthanide tetrafluorides [J].