scholarly journals Upconversion luminescence in Er3+ doped Ga10Ge25S65 glass and glass-ceramic excited in the near-infrared

2013 ◽  
Vol 113 (8) ◽  
pp. 083520 ◽  
Author(s):  
Whualkuer Lozano B. ◽  
Cid B. de Araújo ◽  
Yannick Ledemi ◽  
Younes Messaddeq
Keyword(s):  
Glass Ceramic ◽  
Near Infrared ◽  
Upconversion Luminescence

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

Nanomaterials ◽  
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.

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

Materials ◽  
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.

Broadband near-infrared persistent luminescence in Ni2+-doped transparent glass-ceramic ZnGa2O4

2021 ◽  
Author(s):  
Tianpeng Liu ◽  
Zhiyuan Liu ◽  
Jiao Wu ◽  
Kang Zhang ◽  
Hongxiang An ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Glass Ceramic ◽  
Near Infrared ◽  
Transition Metal Ions ◽  
Persistent Luminescence ◽  
Transparent Glass ◽  
Luminescence Centers ◽  
Transparent Glass Ceramic

Transparent glass-ceramic is a highly attractive class of materials for photonic application. Transition metal ions are promising candidates for luminescence centers thanks to the sensitivity to the ligand ions of...

Visible upconversion luminescence of Tb3+ ions in Y2O3 nanoparticles induced by a near-infrared femtosecond laser

2010 ◽  
Vol 496 (1-2) ◽  
pp. 488-493 ◽  
Author(s):  
Qiang Lü ◽  
Yingjun Wu ◽  
Lurong Ding ◽  
Guomei Zu ◽  
Aihua Li ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Near Infrared ◽  
Upconversion Luminescence

scholarly journals VISUALIZATION OF Nd3+-DOPED LaF3 NANOPARTICLES FOR NEAR INFRARED BIOIMAGING VIA UPCONVERSION LUMINESCENCE AT MULTIPHOTON EXCITATION MICROSCOPY

2018 ◽  
Vol 7 (1) ◽  
pp. 4-12 ◽  
Author(s):  
A. V. Ryabova ◽  
K. Keevend ◽  
E. Tsolaki ◽  
S. Bertazzo ◽  
D. V. Pominova ◽  
...  
Keyword(s):  
Near Infrared ◽  
Upconversion Luminescence ◽  
Multiphoton Excitation

Near-infrared and upconversion luminescence of Tm3+ and Tm3+/Yb3+-doped oxyfluorosilicate glasses

2019 ◽  
Vol 507 ◽  
pp. 1-10 ◽  
Author(s):  
C.S. Dwaraka Viswanath ◽  
P. Babu ◽  
I.R. Martín ◽  
V. Venkatramu ◽  
V. Lavín ◽  
...  
Keyword(s):  
Near Infrared ◽  
Upconversion Luminescence
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