Tuning the upconversion luminescence of cubic KMnF3:Yb3+/Er3+ nanocrystals through inert lanthanide ion doping

Efficient tailoring of upconversion emissions in conventional single red emitting KMnF3:Yb3+/Er3+ nanocrystals is achieved through local crystal structure engineering and the suppression of energy transfer as well as back transfer, which is of great significance for extended optical applications.

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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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Energy transfer in lanthanide upconversion studies for extended optical applications

Chemical Society Reviews ◽

10.1039/c4cs00188e ◽

2015 ◽

Vol 44 (6) ◽

pp. 1608-1634 ◽

Cited By ~ 517

Author(s):

Hao Dong ◽

Ling-Dong Sun ◽

Chun-Hua Yan

Keyword(s):

Energy Transfer ◽

Optical Applications ◽

Upconversion Emissions

In this review, the various energy transfer pathways involved in lanthanide-related upconversion emissions are comprehensively discussed.

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A homogeneous biosensor for Human Epididymis Protein 4 based on upconversion luminescence resonance energy transfer

Microchemical Journal ◽

10.1016/j.microc.2021.106083 ◽

2021 ◽

Vol 164 ◽

pp. 106083

Author(s):

Xiuqing Ma ◽

Guiling Huang ◽

Miantai Ye ◽

Xiaojing Zhang ◽

Yanying Wang ◽

...

Keyword(s):

Energy Transfer ◽

Upconversion Luminescence ◽

Resonance Energy Transfer ◽

Resonance Energy ◽

Human Epididymis Protein 4 ◽

Human Epididymis

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Anomalously Strong Second‐Harmonic Generation in GaAs Nanowires via Crystal‐Structure Engineering

Advanced Functional Materials ◽

10.1002/adfm.202104671 ◽

2021 ◽

pp. 2104671

Author(s):

Bin Zhang ◽

Jan E. Stehr ◽

Ping‐Ping Chen ◽

Xingjun Wang ◽

Fumitaro Ishikawa ◽

...

Keyword(s):

Crystal Structure ◽

Second Harmonic Generation ◽

Harmonic Generation ◽

Second Harmonic ◽

Gaas Nanowires ◽

Structure Engineering

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Upconversion Luminescence of Silica–Calcia Nanoparticles Co-doped with Tm3+ and Yb3+ Ions

Materials ◽

10.3390/ma14040937 ◽

2021 ◽

Vol 14 (4) ◽

pp. 937

Author(s):

Katarzyna Halubek-Gluchowska ◽

Damian Szymański ◽

Thi Ngoc Lam Tran ◽

Maurizio Ferrari ◽

Anna Lukowiak

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Upconversion Luminescence ◽

Sol Gel ◽

Emission Spectra ◽

Transmission Electron ◽

Characteristic Emission ◽

Diffraction Patterns ◽

Size Of Particles ◽

Average Size

Looking for upconverting biocompatible nanoparticles, we have prepared by the sol–gel method, silica–calcia glass nanopowders doped with different concentration of Tm3+ and Yb3+ ions (Tm3+ from 0.15 mol% up to 0.5 mol% and Yb3+ from 1 mol% up to 4 mol%) and characterized their structure, morphology, and optical properties. X-ray diffraction patterns indicated an amorphous phase of the silica-based glass with partial crystallization of samples with a higher content of lanthanides ions. Transmission electron microscopy images showed that the average size of particles decreased with increasing lanthanides content. The upconversion (UC) emission spectra and fluorescence lifetimes were registered under near infrared excitation (980 nm) at room temperature to study the energy transfer between Yb3+ and Tm3+ at various active ions concentrations. Characteristic emission bands of Tm3+ ions in the range of 350 nm to 850 nm were observed. To understand the mechanism of Yb3+–Tm3+ UC energy transfer in the SiO2–CaO powders, the kinetics of luminescence decays were studied.

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Enhancing static green upconversion luminescence of NaY(MoO4)2: Yb/Er microcrystals via annealing strategy for anti-counterfeiting applications

Dalton Transactions ◽

10.1039/d1dt00948f ◽

2021 ◽

Author(s):

Xiangyu Zhang ◽

Jialing Wu ◽

Peng Wang ◽

Jie Gao ◽

Feng Gao ◽

...

Keyword(s):

Crystal Structure ◽

Thermal Treatment ◽

Upconversion Luminescence ◽

Luminescence Enhancement ◽

Doped Materials

The majority of the fabricated procedures of lanthanide doped materials involve in thermal treatment which often results in crystallite regrowth, stabilizing the specific crystal structure and luminescence enhancement. The efficiency...

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