Upconversion Lifetime Imaging of Highly-Crystalline Gd-Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers

Yueshan Xu; Zhichao Zeng; Dan Zhang; Songtao Liu; Xian Wang; Sai Li; Chunyan Cheng; Jianxun Wang; Yuanyuan Liu; Gejihu De; Chao Zhang; Weiping Qin; Yaping Du

doi:10.1002/adom.201901495

Upconversion Lifetime Imaging of Highly-Crystalline Gd-Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers

Yueshan Xu, Zhichao Zeng, Dan Zhang, Songtao Liu, Xian Wang, Sai Li, Chunyan Cheng, Jianxun Wang, Yuanyuan Liu, Gejihu De, Chao Zhang, Weiping Qin, Yaping Du

Research output: Contribution to journal › Article › peer-review

16 Scopus citations

Abstract

Highly-crystalline Gd-based fluoride upconversion (UC) nanocrystals, including orthorhombic-phase GdF₃:Yb/Er nanoplates (NPLs), hexagonal-phase NaGdF₄:Yb/Er NPLs, monoclinic-phase K₃GdF₆:Yb/Er nanoribbons (NRs), and orthorhombic-phase KGdF₄:Yb/Er NRs are controllably synthesized through a simple yet robust method, with all of the products exhibiting strong UC luminescence. Notably, the obtained K₃GdF₆:Yb/Er NRs have an exceptional quantum yield as high as 0.84% at a low excitation laser power (0.30 W cm⁻², 975 nm), as well as long single-particle UC lifetimes (τ) for green (τ = 0.70 ms) and red (τ = 1.10 ms) emissions. The enhanced luminescence is attributed to the “multiple luminescent center effect,” which is verified via the laser-selective excitation spectra of deliberately introduced Eu³⁺ dopants. This method can be extended to the preparation of a number of other nanocrystals, and the UC nanocrystals featuring high luminescence efficiencies can be further tailored for biomedical applications.

Original language	English
Article number	1901495
Journal	Advanced Optical Materials
Volume	8
Issue number	4
DOIs	https://doi.org/10.1002/adom.201901495
State	Published - 1 Feb 2020
Externally published	Yes

Keywords

highly-crystalline structures
lifetime imaging
luminescent centers
rare earth nanocrystals
upconversion luminescence

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10.1002/adom.201901495

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Xu, Y., Zeng, Z., Zhang, D., Liu, S., Wang, X., Li, S., Cheng, C., Wang, J., Liu, Y., De, G., Zhang, C., Qin, W., & Du, Y. (2020). Upconversion Lifetime Imaging of Highly-Crystalline Gd-Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers. Advanced Optical Materials, 8(4), Article 1901495. https://doi.org/10.1002/adom.201901495

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title = "Upconversion Lifetime Imaging of Highly-Crystalline Gd-Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers",

abstract = "Highly-crystalline Gd-based fluoride upconversion (UC) nanocrystals, including orthorhombic-phase GdF3:Yb/Er nanoplates (NPLs), hexagonal-phase NaGdF4:Yb/Er NPLs, monoclinic-phase K3GdF6:Yb/Er nanoribbons (NRs), and orthorhombic-phase KGdF4:Yb/Er NRs are controllably synthesized through a simple yet robust method, with all of the products exhibiting strong UC luminescence. Notably, the obtained K3GdF6:Yb/Er NRs have an exceptional quantum yield as high as 0.84% at a low excitation laser power (0.30 W cm−2, 975 nm), as well as long single-particle UC lifetimes (τ) for green (τ = 0.70 ms) and red (τ = 1.10 ms) emissions. The enhanced luminescence is attributed to the “multiple luminescent center effect,” which is verified via the laser-selective excitation spectra of deliberately introduced Eu3+ dopants. This method can be extended to the preparation of a number of other nanocrystals, and the UC nanocrystals featuring high luminescence efficiencies can be further tailored for biomedical applications.",

keywords = "highly-crystalline structures, lifetime imaging, luminescent centers, rare earth nanocrystals, upconversion luminescence",

author = "Yueshan Xu and Zhichao Zeng and Dan Zhang and Songtao Liu and Xian Wang and Sai Li and Chunyan Cheng and Jianxun Wang and Yuanyuan Liu and Gejihu De and Chao Zhang and Weiping Qin and Yaping Du",

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doi = "10.1002/adom.201901495",

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AU - Xu, Yueshan

AU - Zeng, Zhichao

AU - Zhang, Dan

AU - Liu, Songtao

AU - Wang, Xian

AU - Li, Sai

AU - Cheng, Chunyan

AU - Wang, Jianxun

AU - Liu, Yuanyuan

AU - De, Gejihu

AU - Zhang, Chao

AU - Qin, Weiping

AU - Du, Yaping

PY - 2020/2/1

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AB - Highly-crystalline Gd-based fluoride upconversion (UC) nanocrystals, including orthorhombic-phase GdF3:Yb/Er nanoplates (NPLs), hexagonal-phase NaGdF4:Yb/Er NPLs, monoclinic-phase K3GdF6:Yb/Er nanoribbons (NRs), and orthorhombic-phase KGdF4:Yb/Er NRs are controllably synthesized through a simple yet robust method, with all of the products exhibiting strong UC luminescence. Notably, the obtained K3GdF6:Yb/Er NRs have an exceptional quantum yield as high as 0.84% at a low excitation laser power (0.30 W cm−2, 975 nm), as well as long single-particle UC lifetimes (τ) for green (τ = 0.70 ms) and red (τ = 1.10 ms) emissions. The enhanced luminescence is attributed to the “multiple luminescent center effect,” which is verified via the laser-selective excitation spectra of deliberately introduced Eu3+ dopants. This method can be extended to the preparation of a number of other nanocrystals, and the UC nanocrystals featuring high luminescence efficiencies can be further tailored for biomedical applications.

KW - highly-crystalline structures

KW - lifetime imaging

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Upconversion Lifetime Imaging of Highly-Crystalline Gd-Based Fluoride Nanocrystals Featuring Strong Luminescence Resulting from Multiple Luminescent Centers

Abstract

Keywords

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