Results 101 to 110 of about 5,621 (248)

Dual Impact of Long‐Lived Localized Carriers Induced by Restricted Hole Transfer in Organic Photovoltaics and Photocatalytic Hydrogen Evolution

Advanced Energy Materials, EarlyView.
This work clarifies why organic semiconductors perform differently in photovoltaic devices and photocatalytic nanoparticles. By examining D18:Y5 and PM6:Y6 systems, we show how aggregation, exciton lifetime, and interfacial charge transfer behavior govern energy‐conversion pathways.
Gayoung Ham, Sanghyeok An, Wooteak Jung, Hyun Min Kwon, Seonghyeon Kang, Jaehyuk Lee, Sowon Kim, Changwoo Park, Damin Lee, Young Yong Kim, Sungjin Jo, Chang Yun Son, Sae Byeok Jo, Dae Sung Chung, Hyojung Cha   +14 more
wiley   +1 more source

Organic thermally activated delayed fluorescence material with strained benzoguanidine donor

Beilstein Journal of Organic Chemistry, 2023
Organic thermally activated delayed fluorescence (TADF) materials have been widely investigated due to their impressive electronic properties and applied potential for the third generation of organic light-emitting diodes (OLED).
Alexander C. Brannan, Elvie F. P. Beaumont, Nguyen Le Phuoc, George F. S. Whitehead, Mikko Linnolahti, Alexander S. Romanov   +5 more
doaj   +1 more source

A Blue Emissive Heavy Atom-Free Multiresonant Thermally Activated Delayed Fluorescent Emitter Shows Ultra-Fast Reverse Intersystem Crossing. [PDF]

Angew Chem Int Ed Engl
The extended π‐system and low‐lying n‐π∗ transition endow DDOBDiKTa with a synergistic combination of strong spin‐orbit coupling, small reorganization energy and small ΔEST, enabling this blue boron‐nitrogen‐carbonyl hybrid emitter to achieve a fast kRISC of 6.34 × 106 s−1 together with OLEDs showing small efficiency roll‐off, with EQEmax/EQE10000 of ...
Wang W, Hafeez H, Wu S, McKay AP, Cordes DB, Samuel IDW, Zysman-Colman E.   +6 more
europepmc   +3 more sources

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

Mechanistische Diversität in der photoangeregten Radikal‐Redoxchemie: Eine kritische Evaluierung

Angewandte Chemie, EarlyView.
Für viele prominente Beispiele der Photoredox‐Katalyse wird angenommen, dass sie über die Anregung einer offenschaligen („open‐shell“) Zwischenform des Katalysators ablaufen. Es wird jedoch intensiv darüber diskutiert, ob solche Mechanismen realistisch sind und, falls ja, wie genau sie ablaufen können.
Samuel J. Horsewill, Ryan Phelps, Joshua P. Barham, Daniel J. Scott   +3 more
wiley   +1 more source

Pyrazine-Based Blue Thermally Activated Delayed Fluorescence Materials: Combine Small Singlet–Triplet Splitting With Large Fluorescence Rate

Frontiers in Chemistry, 2019
Metal-free thermally activated delayed fluorescence (TADF) emitters have emerged as promising candidate materials for highly efficient and low-cost organic light-emitting diodes (OLEDs).
Junyuan Liu, Keren Zhou, Dan Wang, Chao Deng, Ke Duan, Qi Ai, Qisheng Zhang   +6 more
doaj   +1 more source

Au(I) Complex With an Abnormal Carbene Ligand Shows Anti-Kasha Dual Photoluminescence Emission. [PDF]

Angew Chem Int Ed Engl
Incorporation of an abnormal N‐heterocyclic carbene into a heteroleptic linear Au(I) complex induces anti‐Kasha dual emission responsive to biologically relevant phenyl sulfate. ABSTRACT We report the first photoactive linear Au(I) complex with an abnormal N‐heterocyclic carbene (aNHC) ligand, Au(aIm)(Cz).
Rajendran NM, Cheon SB, Shin J, Jang YB, Kim T, You Y.   +5 more
europepmc   +3 more sources

Data_Sheet_1_Sensitizing TADF Absorption Using Variable Length Oligo(phenylene ethynylene) Antennae.pdf

, 2020
Beyond their applications in organic light-emitting diodes (OLEDs), thermally activated delayed fluorescence (TADF) materials can also make good photonic markers.
Daniel Hahn (299198), Marius Jakoby (8493495), Uli Lemmer (1410418), Fabian Hundemer (3192690), Stefan Bräse (2454700), Olga Franco (8493492), Rebekka V. Schneider (8493498), Michael A. R. Meier (7448339), Ian A. Howard (1274673), Bryce S. Richards (1990849)   +9 more
core   +1 more source

Radical TADF: Quartet‐Derived Luminescence with Dark TEMPO

Advanced Materials
AbstractHigh‐spin states in organic molecules offer promising tuneability for quantum technologies. Photogenerated quartet excitons are an extensively studied platform, but their applications are limited by the absence of optical read‐out via luminescence.
Gorgon, S, Murto, P, Congrave, DG, Matasovic, L, Bond, AD, Riesgo‐Gonzalez, V, Myers, WK, Bronstein, H, Friend, RH   +8 more
openaire   +5 more sources

High-Efficiency Sky Blue-To-Green Fluorescent Emitters Based on 3-Pyridinecarbonitrile Derivatives

Frontiers in Chemistry, 2019
The pyridinecarbonitrile derivative is well known as an acceptor unit in fluorescent materials. However, its use in thermally activated delayed fluorescent (TADF) emitters is very limited compared with its benzenecarbonitrile counterparts. Very recently,
Yuki Masuda, Hisahiro Sasabe, Hisahiro Sasabe, Hisahiro Sasabe, Hiroki Arai, Natsuki Onuma, Junji Kido, Junji Kido, Junji Kido   +8 more
doaj   +1 more source