Exploiting the silent upconversion emissions from a single β-NaYF4:Yb/Er microcrystal via saturated excitation

M. Yuan; R. Wang; C. Zhang; Z. Yang; W. Cui; X. Yang; N. Xiao; H. Wang; X. Xu

doi:10.1039/c8tc02193g

Nano-Crystallization of Ln-Fluoride Crystals in Glass-Ceramics via Inducing of Yb3+ for Efficient Near-Infrared Upconversion Luminescence of Tm3+

Nanomaterials ◽

10.3390/nano11041033 ◽

2021 ◽

Vol 11 (4) ◽

pp. 1033

Author(s):

Jianfeng Li ◽

Yi Long ◽

Qichao Zhao ◽

Shupei Zheng ◽

Zaijin Fang ◽

...

Keyword(s):

Crystal Structures ◽

Near Infrared ◽

Upconversion Luminescence ◽

Glass Ceramics ◽

Upconversion Emission ◽

Ceramic Composites ◽

Wide Range ◽

Transmission Window ◽

Optical Applications ◽

Upconversion Emissions

Transparent glass-ceramic composites embedded with Ln-fluoride nanocrystals are prepared in this work to enhance the upconversion luminescence of Tm3+. The crystalline phases, microstructures, and photoluminescence properties of samples are carefully investigated. KYb3F10 nanocrystals are proved to controllably precipitate in the glass-ceramics via the inducing of Yb3+ when the doping concentration varies from 0.5 to 1.5 mol%. Pure near-infrared upconversion emissions are observed and the emission intensities are enhanced in the glass-ceramics as compared to in the precursor glass due to the incorporation of Tm3+ into the KYb3F10 crystal structures via substitutions for Yb3+. Furthermore, KYb2F7 crystals are also nano-crystallized in the glass-ceramics when the Yb3+ concentration exceeds 2.0 mol%. The upconversion emission intensity of Tm3+ is further enhanced by seven times as Tm3+ enters the lattice sites of pure KYb2F7 nanocrystals. The designed glass ceramics provide efficient gain materials for optical applications in the biological transmission window. Moreover, the controllable nano-crystallization strategy induced by Yb3+ opens a new way for engineering a wide range of functional nanomaterials with effective incorporation of Ln3+ ions into fluoride crystal structures.

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Giant enhancement of upconversion emission in NaYF4:Er3+@NaYF4:Yb3+ active-core/active-shell nanoparticles

RSC Advances ◽

10.1039/c5ra25826j ◽

2016 ◽

Vol 6 (27) ◽

pp. 22845-22851 ◽

Cited By ~ 11

Author(s):

Xiangfu Wang ◽

Tongtong Xu ◽

Yanyan Bu ◽

Xiaohong Yan

Keyword(s):

Upconversion Emission ◽

Shell Nanoparticles ◽

Active Core ◽

Upconversion Emissions ◽

Core Nanoparticles

An effective method to enhance greatly infrared-visible upconversion emissions of Er3+ ions is demonstrated through coating an optimized active NaYF4:Yb3+ shell around the NaYF4:Er3+ core nanoparticles.

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UPCONVERSION LUMINESCENCE ENHANCEMENT OF NaYF4:Yb3+, Er3+ NANOPARTICLES ON INVERSE OPAL SURFACE

Surface Review and Letters ◽

10.1142/s0218625x14500176 ◽

2014 ◽

Vol 21 (01) ◽

pp. 1450017 ◽

Cited By ~ 6

Author(s):

JIAYAN LIAO ◽

ZHENGWEN YANG ◽

HANGJUN WU ◽

SHENFENG LAI ◽

JIANBEI QIU ◽

...

Keyword(s):

Upconversion Luminescence ◽

Upconversion Emission ◽

Band Gaps ◽

Inverse Opal ◽

Photonic Band Gaps ◽

Selective Reflection ◽

Inverse Opals ◽

Upconversion Emissions ◽

Photonic Band ◽

Co Doped

LaPO 4 inverse opal photonic crystals with different photonic band gaps were fabricated by template-assisted method. The Yb 3+/ Er 3+ co-doped NaYF 4 nanoparticles were deposited on the surfaces of the inverse opals, and their up-conversion emission properties were investigated. The upconversion emissions of Yb 3+/ Er 3+ co-doped NaYF 4 nanoparticles on the inverse opal surfaces have been enhanced when the upconversion emission bands of the nanoparticles are in the range of photonic band gaps of the inverse opals, which is attributed to an efficient and selective reflection of photonic band gaps.

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Hydrothermal Synthesis and Tunable Multicolor Upconversion Emission of Cubic Phase Y2O3Nanoparticles

Advances in Condensed Matter Physics ◽

10.1155/2013/347406 ◽

2013 ◽

Vol 2013 ◽

pp. 1-6 ◽

Cited By ~ 2

Author(s):

Haibo Wang ◽

Chao Qian ◽

Zhigao Yi ◽

Ling Rao ◽

Hongrong Liu ◽

...

Keyword(s):

Upconversion Luminescence ◽

Upconversion Emission ◽

Cubic Phase ◽

X Ray Diffraction ◽

X Ray ◽

Light Yellow ◽

Color Displays ◽

Transmission Electron ◽

Subsequent Calcination ◽

Upconversion Emissions

Highly crystalline body-centered cubic structure Y2O3with lanthanide (Ln) codopants (Ln = Yb3+/Er3+and Yb3+/Ho3+) has been synthesized via a moderate hydrothermal method in combination with a subsequent calcination. The structure and morphology of Y(OH)3precursors and Y2O3nanoparticles were characterized by X-ray diffraction and transmission electron microscopy. The results reveal that the Y2O3nanoparticles possess cubic phase and form the quasispherical structure. The upconversion luminescence properties of Y2O3nanoparticles doped with different Ln3+(Yb3+/ Er3+and Yb3+/ Ho3+) ions were well investigated under the 980 nm excitation. The results show that the Yb3+/Er3+and Yb3+/Ho3+codoped Y2O3nanoparticles exhibit strong red and light yellow upconversion emissions, respectively. It is expected that these Y2O3nanoparticles with tunable multicolor output and intense red upconversion emission may have potential application in color displays and biolabels.

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Upconversion emission properties of CeO2: Tm3+, Yb3+ inverse opal photonic crystals

Modern Physics Letters B ◽

10.1142/s0217984914502182 ◽

2014 ◽

Vol 28 (27) ◽

pp. 1450218

Author(s):

Gong Cheng ◽

Hangjun Wu ◽

Zhengwen Yang ◽

Jiayan Liao ◽

Shenfeng Lai ◽

...

Keyword(s):

Bragg Reflection ◽

Precursor Solution ◽

Upconversion Emission ◽

Inverse Opal ◽

Polystyrene Microspheres ◽

Inverse Opals ◽

Photon Trapping ◽

Lattice Planes ◽

Upconversion Emissions ◽

Photonic Band

The ordered and disordered templates were assembled by vertical deposition of polystyrene microspheres. The CeO 2: Tm 3+, Yb 3+ precursor solution was used to infiltrate into the voids of the ordered and disordered templates, respectively. Then the ordered and disordered templates were calcined at 950°C in an air furnace, and the CeO 2: Tm 3+, Yb 3+ inverse opals were obtained. The upconversion emissions from CeO 2: Tm 3+, Yb 3+ inverse opals were suppressed due to the photon trapping caused by Bragg reflection of lattice planes when the upconversion emission band was in the range of the photonic band gaps in the inverse opals.

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Optical Temperature Sensor Based on Infrared Excited Green Upconversion Emission in Hexagonal Phase NaLuF4:Yb3+/Er3+ Nanorods

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2016.11872 ◽

2016 ◽

Vol 16 (4) ◽

pp. 3641-3645 ◽

Cited By ~ 7

Author(s):

Dongyu Li ◽

Linlin Tian ◽

Zhen Huang ◽

Lexi Shao ◽

Jun Quan ◽

...

Keyword(s):

Temperature Sensor ◽

Hexagonal Phase ◽

Upconversion Emission ◽

Excitation Power ◽

Temperature Sensitive ◽

Potential Candidate ◽

Excitation Power Density ◽

Fluorescence Intensity Ratio ◽

Optical Temperature Sensor ◽

Upconversion Emissions

Hexagonal phase NaLuF4:Yb3+/Er3+ nanorods were synthesized hydrothermally. An analysis of the intense green upconversion emissions at 525 nm and 550 nm in hexagonal phase NaLuF4:Yb3/+Er3+ nanorods under excitation power density of 4.2 W/cm2 available from a diode laser emitting at 976 nm, have been undertaken. Fluorescence intensity ratio (FIR) variation of temperature-sensitive green upconversion emissions at 525 nm and 550 nm in this material was recorded in the physiological range from 295 to 343 K. The maximum sensitivity derived from the FIR technique of the green upconversion emissions is approximately 0.0044 K−1. Experimental results implied that hexagonal phase NaLuF4:Yb3/+Er3+ nanorods was a potential candidate for optical temperature sensor.

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Dynamics of the Green and Red Upconversion Emissions inYb3+-Er3+-CodopedY2O3Nanorods

Journal of Nanomaterials ◽

10.1155/2010/491982 ◽

2010 ◽

Vol 2010 ◽

pp. 1-8 ◽

Cited By ~ 3

Author(s):

O. Meza ◽

L. A. Diaz-Torres ◽

P. Salas ◽

C. Angeles-Chavez ◽

A. Martínez ◽

...

Keyword(s):

Energy Transfer ◽

Excellent Agreement ◽

Upconversion Emission ◽

Nonradiative Energy Transfer ◽

Transfer Model ◽

Solvent Ratio ◽

Upconversion Emissions ◽

Transfer Mechanisms ◽

Energy Transfer Model ◽

Experimental Decay

Efficient green and red upconversion emission inY2O3:Yb3+,Er3+nanorods under 978 nm radiation excitation is achieved. Experimental effective lifetimes, luminescent emissions, and nanorod sizes depend strongly on the solvent ratios used during the synthesis. A microscopic nonradiative energy transfer model is used to approach the dynamics of the green, red, and infrared emissions. The excellent agreement between simulated and experimental decay suggests that the energy transfer mechanisms responsible of the visible emission depend on the solvent ratio.

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