Results 71 to 80 of about 90,891 (346)

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

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

Probing the Wave Function and Dynamics of the Quintet Multiexciton State with Coherent Control in a Singlet Fission Material

Physical Review X, 2020
High-spin states play a key role in chemical reactions found in nature. In artificial molecular systems, singlet fission produces a correlated triplet-pair state, a spin-bearing excited state that can be harnessed for more efficient solar-energy ...
S. L. Bayliss, L. R. Weiss, F. Kraffert, D. B. Granger, J. E. Anthony, J. Behrends, R. Bittl   +6 more
doaj   +1 more source

Room Temperature Phosphorescence Emission From Multi-States

Frontiers in Chemistry, 2022
Organic room temperature phosphorescence (RTP) materials have received considerable attention due to their fascinating photophysical properties. During the past decade, various organic luminogens exhibiting RTP emission in solid states were reported ...
Xiaofeng Zhang, Beibei Zhang, Ji Luo, Song Guo, Chun Wei, Yongyang Gong   +5 more
doaj   +1 more source

Orbital Geometry‐Governed Response of Pressure‐Tunable Quantum Defects in hBN

Advanced Functional Materials, EarlyView.
Defects in hBN act as ultrasensitive quantum manometers when the energy of the intradefect optical transitions is modified by lattice compression. The orbital geometry of the electron wave functions governs how electron hopping and Coulomb interactions react uniquely to the reduction of the van der Waals gap and in‐plane compression, leading to robust ...
Magdalena Grzeszczyk, Danis I. Badrtdinov, Kenji Watanabe, Takashi Taniguchi, Cyrus E. Dreyer, Malte Rösner, Maciej Koperski   +6 more
wiley   +1 more source

Roles of Localized Electronic Structures Caused by π Degeneracy Due to Highly Symmetric Heavy Atom‐Free Conjugated Molecular Crystals Leading to Efficient Persistent Room‐Temperature Phosphorescence

Advanced Science, 2019
Conjugated molecular crystals with persistent room‐temperature phosphorescence (RTP) are promising materials for sensing, security, and bioimaging applications.
Shuzo Hirata
doaj   +1 more source

Exciton Binding Energy of Phosphorescent Emitter Molecules in Organic Light‐Emitting Diodes

Advanced Functional Materials, EarlyView.
Energy level alignment is key to efficient OLED design, yet determining LUMO energies remains challenging. A methodology based on field‐induced dissociation and kinetic Monte Carlo simulations is presented to extract LUMO energies of iridium‐based phosphorescent emitters from their exciton binding energy.
Hiroki Tomita, Lucas R. L. Norg, Patrick Diederen, Clint van Hoesel, Christ H. L. Weijtens, Peter A. Bobbert, Reinder Coehoorn   +6 more
wiley   +1 more source

A reatividade do estado excitado triplete de 1,3-indanodiona em benzeno Triplet excited state reactivity of 1,3-indandione in benzene solution

Química Nova, 2007
Rate constants for the quenching of 1,3-indandione (1) triplet by olefins and by hydrogen and electron donors were obtained employing the laser flash photolysis technique in benzene solution.
Frances R. dos Santos, Mônica T. da Silva, José Carlos Netto-Ferreira, Nanci C. de Lucas   +3 more
doaj   +1 more source

Interplay Between Phase Evolution, Fe Migration, and Oxygen Redox in O3‐Type NaxFeyMn1−yO2 Cathodes

Advanced Functional Materials, EarlyView.
Why do Na‐ion battery cathodes, that are compositionally closely related, follow different structural paths during battery operation? This work shows how Fe content controls when iron atoms migrate from their original sites. Early migration locks the layers and blocks key phase transitions, whereas delayed migration permits fuller structural ...
Morten Johansen, Maria Schou Hansen, Josephine Dunker, Rebekka Klemmt, Dorthe B. Ravnsbæk   +4 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