Results 91 to 100 of about 4,660 (240)

Donor-only substituted benzene achieves thermally activated delayed fluorescence

Communications Chemistry
Thermally activated delayed fluorescence (TADF) is a promising mechanism for harvesting triplet excitons in organic light-emitting diodes (OLEDs). The donor–acceptor (D–A) design is the most conventional strategy for developing efficient TADF emitters. A
Masashi Mamada, Sawako Yada, Masahiro Hayakawa, Ryota Uchida, Hiroshi Katagiri, Takuji Hatakeyama, Chihaya Adachi   +6 more
doaj   +1 more source

Large area inkjet-printed OLED fabrication with solution-processed TADF ink

Nature Communications, 2023
This work demonstrates successful large area inkjet printing of a thermally activated delayed fluorescence (TADF) material as the emitting layer of organic light-emitting diodes (OLEDs).
Chandra Kant, Atul Shukla, Sarah K. M. McGregor, Shih-Chun Lo, Ebinazar B. Namdas, Monica Katiyar   +5 more
doaj   +1 more source

Investigation of the Mechanisms Giving Rise to TADF in Exciplex States [PDF]

The Journal of Physical Chemistry C, 2016
The donor–acceptor systems studied in this work have been demonstrated to show strong exciplex formation by their red-shifted PL emission when compared with the individual donor and acceptor molecules, and all give rise to delayed fluorescence. In all cases, the channels by which this delayed fluorescence is generated, along with the energy levels ...
dos Santos, Paloma Lays, Dias, Fernando B., Monkman, Andrew P.   +2 more
openaire   +3 more sources

Mechano-Stimulus and Environment Dependent Circularly Polar-ized TADF in Chiral Copper(I) Complexes and their Application in OLEDs

, 2022
Molecular emitters that combine circularly polarized luminescence (CPL) and high radiative rate constants of the triplet exci-ton decay are highly attractive for electroluminescent devices (OLEDs) or next generation photonic applications, such as ...
André M. T., Muthig, Björn, Ewald, Julia, Kuhnt, Thomas, Ferschke, Ondrej, Mrozek, Jens, Pflaum, Maximilian, Rödel, Andreas, Steffen, Carsten, Lenczyk   +8 more
core   +1 more source

Accessing Sn≥2 States of a TADF Emitter by Femtosecond NIR Spectroscopy

Chemistry – A European Journal, EarlyView.
The depicted thermally activated delayed fluorescence (TADF) emitter was studied by femtosecond near‐infrared (NIR) spectroscopy. A prominent NIR transition was shown to be strongly solvent‐dependent, with implication for intersystem crossing in the compound.
Wiebke Haselbach, Jasmin Matthes, Andreas Prüfer, Simon L. Zimmermann, Monika Flörke, Thomas J. J. Müller, Peter Gilch, Barbara E. Nogueira de Faria   +7 more
wiley   +1 more source

Palladium Catalyzed C3-(sp2)-H Alkenylation of Pyrroles: A Direct Access to Novel Organic Thermally Activated Delayed Fluorescence (TADF) Materials

, 2023
A Pd (II)-catalyzed direct C3-(sp2)-H alkenylation of heteroarenes using benzothiazole as a directing group has been successfully achieved. A wide range of 2-N-alkylpyrroles undergo an oxidative coupling with a variety of acrylates to furnish highly ...
Anindita , Bhowmick, Abhijit, Chatterjee, Javed Y. , Shaikh, Debasish , Laha, Dr. Ramakrishna G., Bhat   +4 more
core   +1 more source

N‐Aryl Acridone Derivatives as Effective Catalysts for Energy Transfer Reactions

Chemistry – A European Journal, EarlyView.
Acridones derivatives have high triplet energy, are simple accessible, and could be used in challenging [2+2] ENT reactions. ABSTRACT Organic photocatalysts capable of promoting high‐energy triplet energy transfer (EnT) remain limited, particularly for demanding [2+2] photocycloaddition reactions.
Francesco Calogero, Gaetano D'Onghia, Federica Fina, Zakaria Ziani, Luca Sensoli, Andrea Gualandi, Andrea Fermi, Paola Ceroni, Pier Giorgio Cozzi   +8 more
wiley   +1 more source

Synthesis and Optical Properties of Diboron Complexes of 1,4‐Anthraquinone Derivatives

Chemistry – A European Journal, EarlyView.
1,4‐Diboron complexes exhibit near‐infrared fluorescence, in contrast to non‐emissive 1,5‐diboron analogues. Fluorescence quantum yields decrease with increasing electron‐donating substituents, attributed to enhanced nonradiative decay via intramolecular PeT.
Yasuhiro Kubota, Ayumi Ogasawara, Ayato Hakamada, Naoya Suzuki, Masayasu Taki, Shota Mizuno, Toshiyasu Inuzuka, Kazumasa Funabiki, Chie Yamada‐Kubota, Miho Kuwahara, Tetsuya Hara   +10 more
wiley   +1 more source

The combination of a donor-acceptor thermally activated delayed fluorescence moiety (TADF) and a multiresonant (MR-TADF) emitting core results in outstanding electroluminescence performance

Here we demonstrate the utility and potential of an emitter design consisting of a narrowband-emitting multiresonant thermally activated delayed fluorescent (MR-TADF) core that is decorated by a suitably higher energy donor-acceptor TADF moiety. Not only
Kai, Wang, Dongyang, Chen, Eli, Zysman-Colman, Hui, Wang, Dianming, Sun, Xiaohong, Zhang, Sen, Wu   +6 more
core   +1 more source

Asymmetric Diphosphane Dioxides With A–π–A–π’–D Scaffolds for High‐Purity Deep‐Blue Luminescence

Chemistry – A European Journal, EarlyView.
Diphosphane dioxide‐based luminophores with donor–π–acceptor– π’–acceptor scaffold enable efficient deep‐blue emission from tunable charge‐transfer states affording high photoluminescence up to 95%. OLEDs reach EQE 4.9%, aided by triplet–triplet annihilation, highlighting a practical route to high‐performance blue emitters.
Eetu Hakkarainen, Zong‐Ying Liu, Jhon Sebastian Oviedo Ortiz, Nicolas Vanthuyne, Jeanne Crassous, Ondřej Mrózek, Fabien B. L. Cougnon, Wen‐Yi Hung, Pi‐Tai Chou, Igor O. Koshevoy, Andrey Belyaev   +10 more
wiley   +1 more source