Results 31 to 40 of about 22,469 (293)
Effects of inert shell on the upconversion intensity and color of Na(Er/Yb)F4 nanocrystals
AIP Advances, 2021 Inert passivation can significantly enhance the upconversion intensity of lanthanide ion doped nanocrystals, especially in the heavily doped cases. In this paper, we revealed that, besides the well-known enhancement of intensity, the inert shell can also
Ziwen Zhou +7 more
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The Dispersion Reduction Frequency Upconversion System at 1550 nm With Tightly Focused Beam
IEEE Access, 2022 The upconversion detection is a promising method to detect infrared radiation. It is proved that the focused beam makes a contribution to improving the upconversion efficiency.
Yuqi Jiang +3 more
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Precharging Photon Upconversion: Interfacial Interactions in Solution-Processed Perovskite Upconversion Devices [PDF]
, 2019 Recent advances in perovskite-sensitized photon upconversion via triplet-triplet annihilation (TTA) in rubrene have yielded several unanswered questions about the underlying mechanism and processes occurring at the interface.
Sarah Wieghold (7361013) +3 more
core +1 more source
Synthesis and emission dynamics of sub-3 nm upconversion nanoparticles [PDF]
, 2023 Reducing the size of upconversion nanoparticles (UCNPs) down to a few nm yields unique luminescent materials containing a very small number of emitters.
Baptiste, Amouroux +11 more
core +2 more sources
Oxide phosphors for light upconversion; Yb3+ and Tm3+ co-doped Y2BaZnO5 [PDF]
, 2011 Copyright 2011 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Richard J. Curry +23 more
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Scientific Reports, 2018 The multiplexing capacity of conventional fluorescence materials are significantly limited by spectral overlap and background interference, mainly due to their short-lived fluorescence lifetimes.
Heng Qin +5 more
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Avalanche upconversion in Tm:YALO_3 [PDF]
Optics Letters, 1991 We report the sudden appearance of upconversion fluorescence and resonant increasing absorption above a threshold intensity in Tm YALO3 at room temperature. These effects are shown to arise from nonlinear, cooperative, excited-state dynamics. Comparison with quantum theory reveals essential roles both for pairwise cross relaxation and excitation ...
H, Ni, S C, Rand
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Upconversion nanoparticles for bioimaging
Nanotechnology Reviews, 2017 Fluorescent labeling is a widely used indispensable tool in biology. Conventional downconversion fluorescence labels with ultraviolet or short-wavelength excitation suffer from autofluorescence, low signal-to-noise ratio, and incident photo damage to ...
Song Chenxi +5 more
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Photochemical upconversion in water
Chem. Commun., 2017 The current investigation achieves photochemical upconversion in pure water using combinations of water soluble Ru( ii ) metal-to-ligand charge transfer (MLCT) sensitizers in concert with 9-anthracenecarboxylate (AnCO 2 − ) and 1 ...
Karim A. El Roz, Felix N. Castellano
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Ultra-stable near-infrared Tm3+-doped upconversion nanoparticles for in vivo wide-field two-photon angiography with a low excitation intensity [PDF]
Journal of Innovative Optical Health Sciences, 2019 Two-photon luminescence with near-infrared (NIR) excitation of upconversion nanoparticles (NPs) is of great importance in biological imaging due to deep penetration in high-scattering tissues, low auto-luminescence and good sectioning ability ...
Wen Liu, Runze Chen, Sailing He
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