Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers

Jiayin Zhang; Feng Qin; Hua Zhao; Xin Yang; Xitian Zhang; Xuanzhang Wang; Hong Gao; Zhiguo Zhang; Wenwu Cao

doi:10.1039/c4ce01441c

Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers

Jiayin Zhang, Feng Qin, Hua Zhao, Xin Yang, Xitian Zhang, Xuanzhang Wang, Hong Gao, Zhiguo Zhang, Wenwu Cao

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

2 Scopus citations

Abstract

A special core/shell/shell structured NaYF₄/NaYF₄:Yb³⁺,Er³⁺/NaYF₄ (CSS) nanocrystal was designed to ensure each luminescence center in the emitting shell had the same surroundings. The nanocrystal includes a support core NaYF₄ nanoparticle in the center coated by a thin emitting shell NaYF₄:Yb³⁺,Er³⁺ and another NaYF₄ shell with adjustable thickness as the outer shielding shell. The green upconversion fluorescence intensity I_g(d) of the CSS nanoparticles shows an exponential relationship with the thickness d of the shielding shell. When d decreased to 0, I_g(0) was ~356 times smaller than I_g(∞) due to the drastic fluorescence quenching of the rare earth luminescence centers by the surroundings. Our experimental results indicate that ~90% of the severe effect of the surroundings can be eliminated by coating with a ~4 nm-thick NaYF₄ shielding shell.

Original language	English (US)
Pages (from-to)	9974-9978
Number of pages	5
Journal	CrystEngComm
Volume	16
Issue number	43
DOIs	https://doi.org/10.1039/c4ce01441c
State	Published - Nov 21 2014

All Science Journal Classification (ASJC) codes

General Chemistry
General Materials Science
Condensed Matter Physics

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title = "Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers",

abstract = "A special core/shell/shell structured NaYF4/NaYF4:Yb3+,Er3+/NaYF4 (CSS) nanocrystal was designed to ensure each luminescence center in the emitting shell had the same surroundings. The nanocrystal includes a support core NaYF4 nanoparticle in the center coated by a thin emitting shell NaYF4:Yb3+,Er3+ and another NaYF4 shell with adjustable thickness as the outer shielding shell. The green upconversion fluorescence intensity Ig(d) of the CSS nanoparticles shows an exponential relationship with the thickness d of the shielding shell. When d decreased to 0, Ig(0) was ~356 times smaller than Ig(∞) due to the drastic fluorescence quenching of the rare earth luminescence centers by the surroundings. Our experimental results indicate that ~90% of the severe effect of the surroundings can be eliminated by coating with a ~4 nm-thick NaYF4 shielding shell.",

author = "Jiayin Zhang and Feng Qin and Hua Zhao and Xin Yang and Xitian Zhang and Xuanzhang Wang and Hong Gao and Zhiguo Zhang and Wenwu Cao",

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T1 - Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers

AU - Zhang, Jiayin

AU - Qin, Feng

AU - Zhao, Hua

AU - Yang, Xin

AU - Zhang, Xitian

AU - Wang, Xuanzhang

AU - Gao, Hong

AU - Zhang, Zhiguo

AU - Cao, Wenwu

PY - 2014/11/21

Y1 - 2014/11/21

N2 - A special core/shell/shell structured NaYF4/NaYF4:Yb3+,Er3+/NaYF4 (CSS) nanocrystal was designed to ensure each luminescence center in the emitting shell had the same surroundings. The nanocrystal includes a support core NaYF4 nanoparticle in the center coated by a thin emitting shell NaYF4:Yb3+,Er3+ and another NaYF4 shell with adjustable thickness as the outer shielding shell. The green upconversion fluorescence intensity Ig(d) of the CSS nanoparticles shows an exponential relationship with the thickness d of the shielding shell. When d decreased to 0, Ig(0) was ~356 times smaller than Ig(∞) due to the drastic fluorescence quenching of the rare earth luminescence centers by the surroundings. Our experimental results indicate that ~90% of the severe effect of the surroundings can be eliminated by coating with a ~4 nm-thick NaYF4 shielding shell.

AB - A special core/shell/shell structured NaYF4/NaYF4:Yb3+,Er3+/NaYF4 (CSS) nanocrystal was designed to ensure each luminescence center in the emitting shell had the same surroundings. The nanocrystal includes a support core NaYF4 nanoparticle in the center coated by a thin emitting shell NaYF4:Yb3+,Er3+ and another NaYF4 shell with adjustable thickness as the outer shielding shell. The green upconversion fluorescence intensity Ig(d) of the CSS nanoparticles shows an exponential relationship with the thickness d of the shielding shell. When d decreased to 0, Ig(0) was ~356 times smaller than Ig(∞) due to the drastic fluorescence quenching of the rare earth luminescence centers by the surroundings. Our experimental results indicate that ~90% of the severe effect of the surroundings can be eliminated by coating with a ~4 nm-thick NaYF4 shielding shell.

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DO - 10.1039/c4ce01441c

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EP - 9978

JO - CrystEngComm

JF - CrystEngComm

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ER -

Effects of surroundings on upconversion luminescent properties of rare earth luminescence centers

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