Results 71 to 80 of about 17,253,040 (308)

Ultrafast processes and excited state dynamics in conjugated polymers [PDF]

, 2008
The photophysics of a number of conjugated polymers used in organic display applications has been studied using ultrafast techniques. An updated method for measuring the intersystem crossing rate was developed.
King, Simon
core  

Elongation of Triplet Lifetime Caused by Intramolecular Energy Hopping in Diphenylanthracene Dyads Oriented to Undergo Efficient Triplet–Triplet Annihilation Upconversion [PDF]

, 2021
Triplet–triplet annihilation (TTA)-assisted photon upconversion (TTA-UC) in three dyads (DPA–Cn–DPA), comprised of two diphenylanthracene (DPA) moieties connected by nonconjugated C1, C2, and C3 linkages (Cn), has been investigated.
Yasunori, Matsui, Takuya, Ogaki, Yuto, Kokita, Hiroshi, Ikeda, Masaya, Kanoh, KIyomasa, Honda, Eisuke, Ohta   +6 more
core   +2 more sources

Solution‐Processed Mn‐Doped 2d Perovskite Wavelength Shifters for Noble‐Liquid Photon Detection

Advanced Functional Materials, EarlyView.
Solution‐processed Mn2+‐doped PEA2PbBr4 two‐dimensional perovskite films are demonstrated as large‐area wavelength shifters for noble‐liquid photon detectors. Mn2+ incorporation introduces a broad emission band at ∼620 nm with a large Stokes shift, suppressing self‐absorption and matching SiPM sensitivity.
Elisabetta Colantoni, Laura Basiricò, Andrea Ciavatti, Nicolò Tosi, Valentina Cicero, Massimo Loriggiola, Beatrice Fraboni   +6 more
wiley   +1 more source

Comparison of Composite Materials Designed to Optimize Heterogeneous Decatungstate Oxidative Photocatalysis

Molecules
Catalysis plays a pivotal role in green chemistry practices, particularly in reducing waste generated during chemical synthesis. Decatungstate (DT) emerges as a potent photocatalyst for Type I oxidations, exhibiting remarkable resilience to oxygen ...
Julia Ong, Benjamin Cajka, Juan C. Scaiano   +2 more
doaj   +1 more source

Coordination‐Modulated Catalytic Pathways at Carbon Dots‐Supported Single‐Atom Sites Revealed by Thiol Interactions

Advanced Functional Materials, EarlyView.
Carbon dots‐supported single‐atom catalysts provide a model platform for uncovering how coordination interactions regulate catalytic reactivity. Thiol binding at Ru‒N4 centers reshapes the reaction energy landscape of H2O2 activation, dynamically modulating ROS‐generation pathways through electronic‐structure perturbation.
Yihong Chen, Li Zhang, Qian Dong, Qingshi Liu, Kun Wang, Huiping Wang, Shaomin Shuang, Chuan Dong, Jin‐Chang Guo, Xiaojuan Gong, Zhuo Chen, Yingfu Li   +11 more
wiley   +1 more source

Prospects for the Creation of a Photocontrolled Supramolecular Machine Based on a 1,4-Di(azastyryl)benzene Derivative and Cucurbit[7]uril

Molecules
The photophysical processes and photochemical reactions of 1,4-di(azastyryl)benzene (1) derivative {[(E,E)-1](ClO4)2} were investigated by absorption, luminescence, and laser kinetic spectroscopy in the water solution.
Levon S. Atabekyan, Vitaly G. Avakyan, Vyacheslav N. Nuriev, Alexei V. Medved’ko, Sergey Z. Vatsadze, Sergey P. Gromov   +5 more
doaj   +1 more source

Ultrafast Charge and Triplet State Formation in Diketopyrrolopyrrole Low Band Gap Polymer/Fullerene Blends: Influence of Nanoscale Morphology of Organic Photovoltaic Materials on Charge Recombination to the Triplet State

Journal of Spectroscopy, 2017
Femtosecond transient absorption spectroscopy of thin films of two types of morphologies of diketopyrrolopyrrole low band gap polymer/fullerene-adduct blends is presented and indicates triplet state formation by charge recombination, an important loss ...
René M. Williams, Hung-Cheng Chen, Daniele Di Nuzzo, Stephan C. J. Meskers, René A. J. Janssen   +4 more
doaj   +1 more source

Tetracyclic π‐Extended Multi‐Resonant TADF Emitters for Green PSF‐OLEDs With 37.7% EQE and BT.2020‐Compatible Top‐Emitting Devices

Advanced Functional Materials, EarlyView.
Ultra‐narrow green multi‐resonance thermally activated delayed fluorescence emitters have been developed by linear π‐extension strategy using tetracyclic naphtho[2,3‐b]benzofuran unit. The resulting phosphorescence‐sensitized OLEDs achieve a maximum external quantum efficiency of 37.7% in the bottom‐emitting architecture, while the complementary top ...
Eo Jin Jeon, Truong Thi Thuy, Nikita Abitkar, Paramasivam Palanisamy, Jiheon Kim, Myungsun Sim, Athithan Maheshwaran, Jang Hyuk Kwon   +7 more
wiley   +1 more source

Preparation and Photophysical Study of Rhodamine–Perylenebisimide Electron Donor–Acceptor Dyad/Triads Containing Flexible Linkers

Molecules
We report the synthesis and characterization of the photophysical characterization of a series of rhodamine (Rho)–perylenebisimide (PBI) electron donor–acceptor dyad/triads containing flexible alkyl spacers (ethylene or hexylene chains).
Xin Guan, Haotian Bai, Jianzhang Zhao, Yan Wan   +3 more
doaj   +1 more source

Triplet State Lifetime of Anthracene in Benzene Solution

CHIMIA, 1987
The decay kinetics of the triplet state absorption of anthracene in benzene have been measured in conditions of laser flash photolysis, as a function of anthracene concentration and of laser light intensity.
Klaus Haarmann, Edwin Haselbach, Paul Suppan   +2 more
doaj   +1 more source