Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals

doi:10.1038/s41377-021-00550-5

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	Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals
	Y. S. Feng; Z. Li; Q. Q. Li; J. Yuan; L. P. Tu; L. X. Ning and H. Zhang
	2021
发表期刊	Light-Science & Applications
ISSN	2047-7538
卷号	10 期号:1 页码:10
摘要	Internal hydroxyl impurity is known as one of the main detrimental factors affecting the upconversion (UC) efficiency of upconversion luminescence (UCL) nanomaterials. Different from surface/ligand-related emission quenching which can be effectively diminished by, e.g., core/shell structure, internal hydroxyl is easy to be introduced in synthesis but difficult to be quantified and controlled. Therefore, it becomes an obstacle to fully understand the relevant UC mechanism and improve UC efficiency of nanomaterials. Here we report a progress in quantifying and large-range adjustment of the internal hydroxyl impurity in NaYF4 nanocrystals. By combining the spectroscopy study and model simulation, we have quantitatively unraveled the microscopic interactions underlying UCL quenching between internal hydroxyl and the sensitizers and activators, respectively. Furthermore, the internal hydroxyl-involved UC dynamical process is interpreted with a vivid concept of "Survivor effect," i.e., the shorter the migration path of an excited state, the larger the possibility of its surviving from hydroxyl-induced quenching. Apart from the consistent experimental results, this concept can be further evidenced by Monte Carlo simulation, which monitors the variation of energy migration step distribution before and after the hydroxyl introduction. The new quantitative insights shall promote the construction of highly efficient UC materials.
DOI	10.1038/s41377-021-00550-5
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收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/65356
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Y. S. Feng,Z. Li,Q. Q. Li,et al. Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals[J]. Light-Science & Applications,2021,10(1):10.
APA	Y. S. Feng,Z. Li,Q. Q. Li,J. Yuan,L. P. Tu,&L. X. Ning and H. Zhang.(2021).Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals.Light-Science & Applications,10(1),10.
MLA	Y. S. Feng,et al."Internal OH- induced cascade quenching of upconversion luminescence in NaYF4:Yb/Er nanocrystals".Light-Science & Applications 10.1(2021):10.

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