Results 31 to 40 of about 3,703 (147)

Tuning the upconversion photoluminescence lifetimes of NaYF4:Yb3+, Er3+ through lanthanide Gd3+ doping

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, Danyang Wu, Juna Sathian, Xiangyu Xie, Mary Ryan, Fang Xie   +5 more
doaj   +1 more source

Double-layer metasurface for enhanced photon up-conversion

APL Photonics, 2021
We present a double-layer dielectric metasurface obtained by stacking a silicon nanodisk array and a silicon photonic crystal slab with equal periodicity on top of each other.
Phillip Manley, Michele Segantini, Doguscan Ahiboz, Martin Hammerschmidt, Georgios Arnaoutakis, Rowan W. MacQueen, Sven Burger, Christiane Becker   +7 more
doaj   +1 more source

Charge Transfer States in Donor–Acceptor Bulk‐Heterojunctions as Triplet–Triplet Annihilation Sensitizer for Solid‐State Photon Upconversion

Advanced Materials Interfaces, EarlyView.
A near‐infrared photosensitizer that facilitates efficient solid‐state photon upconversion by recycling triplets formed within a fullerene‐based donor–acceptor bulk‐heterojunction system is demonstrated. Spectroscopic investigations reveal that the energy of photogenerated charge transfer states of triplet character (3CT) is subsequently transferred to
Maciej Klein, Alexander R. Ireland, Evan G. Moore, Dennis Delic, Ajay K. Pandey   +4 more
wiley   +1 more source

Photon upconversion with directed emission

Nature Communications, 2016
Photon upconversion can be used to harvest low energy photons, which are otherwise lost in solar cells. Here, Börjesson et al. use a well-oriented liquid crystal matrix to host the upconversion system in order to emit upconverted photons in a ...
K. Börjesson, P. Rudquist, V. Gray, K. Moth-Poulsen   +3 more
doaj   +1 more source

Light‐Programmable Interfaces: From Molecular Photoswitching to Adaptive Membrane Separations

Advanced Materials Interfaces, EarlyView.
This review advances an interface‐centered framework for light‐responsive membranes, linking molecular photoswitches (azobenzene (AZO), spiropyran (SP), diarylethene (DAE), donor–acceptor Stenhouse adducts (DASA), photoacid) to integration strategies in polymeric, porous, self‐assembled, and mixed‐matrix systems.
Liangliang Zhang, Senlin Gu, Jianyang Zhao, Xiaojuan Hao, Lu Hua Li, Jihua Li, Lingxue Kong   +6 more
wiley   +1 more source

Uncovering upconversion photoluminescence in layered PbI2 above room temperature

Scientific Reports
As a van der Waals (vdW) layered semiconductor material, lead iodide (PbI2) possessing a direct bandgap with strong photoluminescence emission in visible range has gained wide attention in applications of photonic and optoelectronic devices.
Sharad Ambardar, Xiaodong Yang, Jie Gao
doaj   +1 more source

Triplet-Triplet Annihilation Based Energy Upconversion Mechanism: Cyanine7 Dye Doped with Super Yellow and Rubrene Hosts

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2020
In this work, two case studies forenergy upconversion mechanisms are presented; one via two photon absorption and the other one via triplet fusion mechanism.
Murat Aydemir
doaj   +1 more source

Tetrathienothiophene Porphyrin as a Metal-Free Sensitizer for Room-Temperature Triplet–Triplet Annihilation Upconversion

Frontiers in Chemistry, 2022
Optically excited triplet states of organic molecules serve as an energy pool for the subsequent processes, either photon energy downhill, such as room temperature phosphorescence, or photon energy uphill process—the triplet–triplet annihilation ...
Aleksey Vasilev, Aleksey Vasilev, Anton Kostadinov, Meglena Kandinska, Katharina Landfester, Stanislav Baluschev, Stanislav Baluschev   +6 more
doaj   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source

TADF‐Emitting Dendrimers for Scalable Bar‐Coating Fabrication of Light‐Emitting Electrochemical Cells

Advanced Materials Technologies, EarlyView.
TADF‐emitting dendrimers promise to enable scalable solution‐based fabrication of efficient electroluminescent devices by the virtue of an attractive set of properties. Here, we report on how light‐emitting electrochemical cells, comprising the TADF‐dendrimer tBuCz2m2pTRZ, can be fabricated by scalable bar‐coating under ambient air and deliver uniform ...
Shi Tang, Dianming Sun, Christian Larsen, Erik Zäll, Eli Zysman‐Colman, Ludvig Edman   +5 more
wiley   +1 more source