Results 31 to 40 of about 19,577 (268)

Elucidating Cooperative Luminescence and Cooperative Sensitisation Upconversion of Nonanuclear Lanthanide Complexes in Solution

, 2021
Upconversion nanoparticles have led to various breakthrough applications in solar energy conversion, imaging, and biomedicine. One key impediment is the facilitation of such processes at the molecular scale in solution where quenching effects are much ...
Loic, Charbonniere, Laura, Frances-Soriano, Richard, Knighton, Guillaume, Pilet, Carlos, Platas-Iglesias, Aurora, Rodriguez-Rodriguez, Lohona, Soro, Marc, Lenertz, Niko, Hildebrandt   +8 more
core   +1 more source

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, Danyang Ning, Yin Zhu, Li Xu, Yanting Yang, Enming Zhao, Lu Liu, Shuangqiang Liu   +7 more
doaj   +1 more source

Optimization of the Cryogenic Light-Emitting Diodes for High-Performance Broadband Terahertz Upconversion Imaging

Frontiers in Physics, 2021
High-performance terahertz (THz) imaging devices have drawn wide attention due to their significant application in a variety of application fields. Recently, the upconversion device based on the integrated homo-junction interfacial workfunction internal ...
Peng Bai, Peng Bai, Yueheng Zhang, Wenzhong Shen, Ning Yang, Weidong Chu   +5 more
doaj   +1 more source

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, Fang Dai, Guohua Gu, Weiji He   +3 more
doaj   +1 more source

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, Marine Laroche, William P. Gillin, Cheetham, Anthony K., Laroche, Marine, Laroche, M, Huignard, A, Cheetham, AK, Berard, M, Etchart, I, Gillin, William P., Gillin, WP, Isabelle Etchart, Curry, RJ, Mathieu Bérard, Arnaud Huignard, Anthony K. Cheetham, Etchart, Isabelle, Hernndez, Ignacio, Ignacio Hernández, Bérard, Mathieu, Curry, Richard J.; id_orcid, Hernandez, I, Huignard, Arnaud   +23 more
core   +1 more source

Near-infrared photon upconversion and solar synthesis using lead-free nanocrystals

, 2022
Near-infrared to visible photon upconversion holds great promise for a diverse range of applications. Current photosensitizers for triplet-fusion upconversion across this spectral window often contain either precious or toxic elements, and have ...
Chengming, Nie, Guohui, Zhao, Wenfei, Liang, Yaoyao, Han, Kaifeng, Wu, Guijie, Liang, Jun, Du, Fan, Yang   +7 more
core   +1 more source

Real-Time Monitoring of Excited-State Ring-Puckering Process in BODIPY Molecule Using Ultrafast Spectroscopy. [PDF]

Chemphyschem
Pyrromethene 597 (PM597), a commercial laser dye, shows a lower fluorescence yield than its analogues. Ultrafast dynamics studies using femtosecond fluorescence upconversion and transient absorption revealed that a non‐radiative ring‐puckering process in the excited state of PM597, occurring with a time constant of 1.3 ps, is primarily responsible for ...
Sen A, Mora AK, Nath S.
europepmc   +2 more sources

Cool Carriers: Triplet Diffusion Dominates Upconversion Yield

, 2023
Perovskites have gained popularity both as the active material in photovoltaics and as bulk triplet sensitizers for solid-state triplet-triplet annihilation upconversion (TTA-UC).
Richard, Schaller, Jason, Kuszynski, Colette, Sullivan, Lea, Nienhaus, Geoffrey, Strouse, Alexey, Kovalev, Theo, Siegrist   +6 more
core   +1 more source

Imparting Biodegradability to Highly-Efficient Upconversion Nanoparticles via Facet-Selective Zirconium Doping. [PDF]

Small
A simple incorporation of Zr imparts biodegradability to inherently inert rare‐earth‐based upconversion nanoparticles without compromising optical performance. Surface energy modulation of LiREF4 facets by a binary‐surfactant system enables Zr incorporation during hot‐injection synthesis.
Abualrejal MMA, Moon BS, Lee TK, Kim S, Yu H, Park S, Kim DH.   +6 more
europepmc   +2 more sources

Continuous Wave Photon Upconversion from a Copper Selenide Nanocrystal Film

, 2023
Photon upconversion is of great interest for improving the efficiency of silicon photovoltaic cells, for biological imaging, and for thermal management strategies.
Renee, Frontiera, Jill, Millstone, Riti, Sen, Christopher, Warkentin   +3 more
core   +1 more source