Upconversion emission enhancement in silica-coated Gd2O 3:Tm3+, Yb3+ nanocrystals by incorporation of Li+ ion

Qiu Sun; Hua Zhao; Xiangqun Chen; Fuping Wang; Wei Cai; Zhaohua Jiang

doi:10.1016/j.matchemphys.2010.05.064

Upconversion emission enhancement in silica-coated Gd₂O ₃:Tm³⁺, Yb³⁺ nanocrystals by incorporation of Li⁺ ion

Qiu Sun
, Hua Zhao
, Xiangqun Chen^*
, Fuping Wang
, Wei Cai
, Zhaohua Jiang

^*Corresponding author for this work

School of Chemistry and Chemical Engineering, Harbin Institute of Technology
Harbin Institute of Technology

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

30 Scopus citations

Abstract

Silica-coated Tm³⁺, Yb³⁺, Li⁺-tridoped Gd₂O₃ nanocrystals (GTYLS) were prepared by a reverse microemulsion method. The blue upconversion luminescence intensity of this nanocomposite was enhanced remarkably by the incorporation of Li⁺ ions as compared with that of lithium-free Gd₂O₃:Tm ³⁺, Yb³⁺@SiO₂ (GTYS) nanocomposites. X-ray diffraction patterns (XRD) of GTYS and GTYLS revealed that Gd₂O ₃ were cubic, silica shell was noncrystalline. The transmission electron microscope (TEM) photographs showed that the core of GTYLS was crystalline with the size of 50-60 nm, and the size of silica shell was about 15 nm. FT-IR spectra indicated that the absorption bands of OH became weaker with increasing the concentration of Li⁺. The enhanced luminescence is due to the distortion of the local asymmetry around Tm³⁺ and the decrease of OH generated by Li⁺ ion incorporation in the lattices.

Original language	English
Pages (from-to)	806-810
Number of pages	5
Journal	Materials Chemistry and Physics
Volume	123
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2010.05.064
State	Published - 1 Oct 2010
Externally published	Yes

Keywords

Coatings
Fourier transform infrared spectroscopy (FT-IR)
Luminescence
Optical materials

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10.1016/j.matchemphys.2010.05.064

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title = "Upconversion emission enhancement in silica-coated Gd2O 3:Tm3+, Yb3+ nanocrystals by incorporation of Li+ ion",

abstract = "Silica-coated Tm3+, Yb3+, Li+-tridoped Gd2O3 nanocrystals (GTYLS) were prepared by a reverse microemulsion method. The blue upconversion luminescence intensity of this nanocomposite was enhanced remarkably by the incorporation of Li+ ions as compared with that of lithium-free Gd2O3:Tm 3+, Yb3+@SiO2 (GTYS) nanocomposites. X-ray diffraction patterns (XRD) of GTYS and GTYLS revealed that Gd2O 3 were cubic, silica shell was noncrystalline. The transmission electron microscope (TEM) photographs showed that the core of GTYLS was crystalline with the size of 50-60 nm, and the size of silica shell was about 15 nm. FT-IR spectra indicated that the absorption bands of OH became weaker with increasing the concentration of Li+. The enhanced luminescence is due to the distortion of the local asymmetry around Tm3+ and the decrease of OH generated by Li+ ion incorporation in the lattices.",

keywords = "Coatings, Fourier transform infrared spectroscopy (FT-IR), Luminescence, Optical materials",

author = "Qiu Sun and Hua Zhao and Xiangqun Chen and Fuping Wang and Wei Cai and Zhaohua Jiang",

year = "2010",

month = oct,

day = "1",

doi = "10.1016/j.matchemphys.2010.05.064",

language = "英语",

volume = "123",

pages = "806--810",

journal = "Materials Chemistry and Physics",

issn = "0254-0584",

publisher = "Elsevier B.V.",

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TY - JOUR

T1 - Upconversion emission enhancement in silica-coated Gd2O 3:Tm3+, Yb3+ nanocrystals by incorporation of Li+ ion

AU - Sun, Qiu

AU - Zhao, Hua

AU - Chen, Xiangqun

AU - Wang, Fuping

AU - Cai, Wei

AU - Jiang, Zhaohua

PY - 2010/10/1

Y1 - 2010/10/1

N2 - Silica-coated Tm3+, Yb3+, Li+-tridoped Gd2O3 nanocrystals (GTYLS) were prepared by a reverse microemulsion method. The blue upconversion luminescence intensity of this nanocomposite was enhanced remarkably by the incorporation of Li+ ions as compared with that of lithium-free Gd2O3:Tm 3+, Yb3+@SiO2 (GTYS) nanocomposites. X-ray diffraction patterns (XRD) of GTYS and GTYLS revealed that Gd2O 3 were cubic, silica shell was noncrystalline. The transmission electron microscope (TEM) photographs showed that the core of GTYLS was crystalline with the size of 50-60 nm, and the size of silica shell was about 15 nm. FT-IR spectra indicated that the absorption bands of OH became weaker with increasing the concentration of Li+. The enhanced luminescence is due to the distortion of the local asymmetry around Tm3+ and the decrease of OH generated by Li+ ion incorporation in the lattices.

AB - Silica-coated Tm3+, Yb3+, Li+-tridoped Gd2O3 nanocrystals (GTYLS) were prepared by a reverse microemulsion method. The blue upconversion luminescence intensity of this nanocomposite was enhanced remarkably by the incorporation of Li+ ions as compared with that of lithium-free Gd2O3:Tm 3+, Yb3+@SiO2 (GTYS) nanocomposites. X-ray diffraction patterns (XRD) of GTYS and GTYLS revealed that Gd2O 3 were cubic, silica shell was noncrystalline. The transmission electron microscope (TEM) photographs showed that the core of GTYLS was crystalline with the size of 50-60 nm, and the size of silica shell was about 15 nm. FT-IR spectra indicated that the absorption bands of OH became weaker with increasing the concentration of Li+. The enhanced luminescence is due to the distortion of the local asymmetry around Tm3+ and the decrease of OH generated by Li+ ion incorporation in the lattices.

KW - Coatings

KW - Fourier transform infrared spectroscopy (FT-IR)

KW - Luminescence

KW - Optical materials

UR - https://www.scopus.com/pages/publications/77955314702

U2 - 10.1016/j.matchemphys.2010.05.064

DO - 10.1016/j.matchemphys.2010.05.064

M3 - 文章

AN - SCOPUS:77955314702

SN - 0254-0584

VL - 123

SP - 806

EP - 810

JO - Materials Chemistry and Physics

JF - Materials Chemistry and Physics

IS - 2-3

ER -

Upconversion emission enhancement in silica-coated Gd₂O ₃:Tm³⁺, Yb³⁺ nanocrystals by incorporation of Li⁺ ion

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Keywords

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