Results 241 to 250 of about 22,469 (293)
Retinocortical in-sensor neuromorphic vision platform for NIR-augmented artificial vision. [PDF]
Nat CommunAn JB +13 more
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Upconversion Colloid for Tracking Cellular Uptake of Nanoparticles. [PDF]
Int J Mol SciNahorniak M +7 more
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Harnessing Rare-Earth Materials as Exogenous Contrast Agents for Enhanced Photoacoustic Imaging. [PDF]
Chem Biomed ImagingSaju H +11 more
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Aminal-linked Covalent Organic Frameworks for Light Energy Upconversion. [PDF]
Angew Chem Int Ed EnglBrzeziński M +7 more
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Angewandte Chemie - International Edition, 2019 AbstractThe many applications of photon upconversion—conversion of low‐energy photons into high‐energy photons—raises the question of the possibility of “electron upconversion”. In this Review, we illustrate how the reduction potential can be increased by using the free energy of exergonic chemical reactions.
Mikhail A Syroeshkin +2 more
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Upconversion-powered photoelectrochemistry
Chem. Commun., 2012Upconversion photochemistry occurring between palladium(II) octaethylporphyrin (PdOEP, 1) and 9,10-diphenylanthracene (DPA, 2) in toluene successfully sensitizes nanostructured WO(3) photoanodes (E(g) = 2.7 eV) to sub-bandgap non-coherent green photons at low power density.
Khnayzer, Rony S. +5 more
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SPIE Proceedings, 2006
This paper presents our research and development effort in realizing and perfecting photon upconversion devices for wavelengths from 1.5 μm region to 0.87 μm. The basic idea is to integrate a 1.5-μm detector with a 0.87-μm light emitting diode (LED), connected in series. The detected photocurrent drives the LED, thereby achieving the upconversion.
H.C. Liu +6 more
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This paper presents our research and development effort in realizing and perfecting photon upconversion devices for wavelengths from 1.5 μm region to 0.87 μm. The basic idea is to integrate a 1.5-μm detector with a 0.87-μm light emitting diode (LED), connected in series. The detected photocurrent drives the LED, thereby achieving the upconversion.
H.C. Liu +6 more
openaire +1 more source
Photon upconversion nanomaterials
Chemical Society Reviews, 2015Guest editors Xiaogang Liu, Chun-Hua Yan and John A. Capobianco introduce the Photon Upconversion Nanomaterials issue of Chemical Society Reviews .
Xiaogang, Liu +2 more
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The Journal of Physical Chemistry Letters, 2014
Upconversion, the conversion of photons from lower to higher energies, is a process that promises applications ranging from high-efficiency photovoltaic and photocatalytic cells to background-free bioimaging and therapeutic probes. Existing upconverting materials, however, remain too inefficient for viable implementation.
Di M, Wu +3 more
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Upconversion, the conversion of photons from lower to higher energies, is a process that promises applications ranging from high-efficiency photovoltaic and photocatalytic cells to background-free bioimaging and therapeutic probes. Existing upconverting materials, however, remain too inefficient for viable implementation.
Di M, Wu +3 more
openaire +2 more sources
Upconversion in laser materials and the upconversion laser
Optical Society of America Annual Meeting, 1990Upconversion, a process in which two low-energy excitations combine to yield one excitation at the sum energy, occurs in most solid-state laser materials. The effect is particularly strong when the doping concentrations are high and when the excited-state level populations are high.
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