Results 71 to 80 of about 4,660 (240)

Multiple Resonance TADF Sensitizers Enable Green-to-Ultraviolet Photon Upconversion: Application in Photochemical Transformations

, 2021
Efficient visible-to-ultraviolet (UV) triplet-triplet annihilation upconversion (TTA-UC) with large anti-Stokes shift is highly promising in solar-powered and indoor applications.
Xiaoguo , Zhou, Ke, Pan, Yuanming, Li, Xiaosong, Cao, Chuluo, Yang, Yaxiong, Wei   +5 more
core   +1 more source

Large‐Scale Determination of Frontier Orbital Energies of Disordered Small‐Molecule Organic Semiconductors Using Exciplex Emission Spectra

Advanced Materials, EarlyView.
ABSTRACT Accurately knowing the frontier orbital energies of the structurally disordered small‐molecule organic semiconductors that are used in optoelectronic devices such as organic light‐emitting diodes is required to rationally improve their performance. Here, we show that these energies can be deduced with a large accuracy from the peak energies of
Christian B. McDonald, Hiroki Tomita, Giacomo Cotelli, Louka L. Brüll, Nanno G. de Rooij, Lucas R.L. Norg, Milo Clément, Reinder Coehoorn   +7 more
wiley   +1 more source

Hinged and Wide: A New P^P Ligand for Emissive [Cu(P^P)(N^N)][PF₆] Complexes

Molecules, 2019
Heteroleptic [Cu(BIPHEP)(N^N)][PF6] complexes (BIPHEP = 1,1′-biphenyl-2,2′-diylbis(diphenylphosphane)), in which N^N is 2,2′-bipyridine (bpy), 6-methyl-2,2′-bipyridine (6-Mebpy), 6-ethyl-2,2′-bipyridine (6-Etbpy), or 5,5 ...
Sarah Keller, Matthias Bantle, Alessandro Prescimone, Edwin C. Constable, Catherine E. Housecroft   +4 more
doaj   +1 more source

Substituent effect on TADF properties of 2-modified 4,6-bis(3,6-di-tert-butyl-9-carbazolyl)-5-methylpyrimidines

Beilstein Journal of Organic Chemistry, 2022
The interest in organic materials exhibiting thermally activated delayed fluorescence (TADF) significantly increased in recent years owing to their potential application as emitters in highly efficient organic light emitting diodes (OLEDs).
Irina Fiodorova, Tomas Serevičius, Rokas Skaisgiris, Saulius Juršėnas, Sigitas Tumkevicius   +4 more
doaj   +1 more source

Mitigating Efficiency Roll‐Off in Phosphor‐Sensitized Fluorescence OLEDs via Molecular Polarity‐Based Benzofuropyridine Host Engineering

Advanced Optical Materials, EarlyView.
Positional isomerism in dibenzofuran‐based n‐type hosts modulates molecular polarity, charge‐transport balance, and emissive‐layer packing. The higher‐polarity BFPDB‐2 host facilitates efficient energy funneling, reduced aggregation, and preferential dipole orientation, leading to phosphor‐sensitized fluorescence OLEDs with enhanced external quantum ...
Nargis Ali, Xuyao Song, Yun‐Hi Kim, Min Chul Suh   +3 more
wiley   +1 more source

Naphthyridine‐Based Donor–Acceptor Boron Difluoride Complexes Targeting Red Emission in Organic Light‐Emitting Diodes

Advanced Optical Materials, EarlyView.
Four donor–acceptor boron difluoride complexes based on triphenylamine donor and a naphthyridine acceptor units were synthesized, studied, and applied as OLED emitters. They exhibit pronounced intramolecular charge transfer character, balanced charge transport properties, and tunable emission. Near‐unity PLQYs are achieved for selected compounds, while
Omar Lahna, Stepan Kutsiy, Dmytro Volyniuk, Roman Luboradzki, Elina Andresen, Ute Resch‐Genger, Juozas V. Grazulevicius, Pavlo Stakhira, Mykhaylo A. Potopnyk   +8 more
wiley   +1 more source

Revealing the spin–vibronic coupling mechanism of thermally activated delayed fluorescence

Nature Communications, 2016
Knowing the photophysics of thermally-activated delayed fluorescence (TADF) is crucial when designing organic light emitting diodes. Here the authors show that spin orbit coupling in TADF materials is described by a second order vibronic coupling ...
Marc K. Etherington, Jamie Gibson, Heather F. Higginbotham, Thomas J. Penfold, Andrew P. Monkman   +4 more
doaj   +1 more source

Recent Advances in Metal-TADF Emitters and Their Application in Organic Light-Emitting Diodes

Frontiers in Chemistry, 2020
In this contribution, recent advances in new classes of efficient metal-TADF complexes, especially those of Au(I), Au(III), and W(VI), and their application in OLEDs are reviewed.
Wai-Pong To, Gang Cheng, Gang Cheng, Glenna So Ming Tong, Dongling Zhou, Chi-Ming Che, Chi-Ming Che   +6 more
doaj   +1 more source

Improving Processability and Efficiency of Resonant TADF Emitters: A Design Strategy [PDF]

Advanced Optical Materials, 2019
AbstractA new design strategy is introduced to address a persistent weakness with resonance thermally activated delayed fluorescence (R‐TADF) emitters to reduce aggregation‐caused quenching effects, which are identified as one of the key limiting factors. The emitter Mes3DiKTa shows an improved photoluminescence quantum yield of 80% compared to 75% for
Hall, David, Suresh, Subeesh Madayanad, dos Santos, Paloma L., Duda, Eimantas, Bagnich, Sergey, Pershin, Anton, Rajamalli, Pachaiyappan, Cordes, David B., Slawin, Alexandra M. Z., Beljonne, David, Köhler, Anna, Samuel, Ifor D. W., Olivier, Yoann, Zysman‐Colman, Eli   +13 more
openaire   +5 more sources

Merging Boron and Carbonyl based MR-TADF Emitter Designs to Achieve High Performance Deep Blue OLEDs

, 2023
Multiresonant thermally activated delayed fluorescence (MR-TADF) compounds are attractive as emitters for organic light-emitting diodes (OLEDs) as they simultaneously can harvest both singlet and triplet excitons to produce light and show very narrowband
Ifor, Samuel, Le, Zhang, Jingxiang, Wang, Eli, Zysman-Colman, Sen, Wu, Abhishek, Kumar Gupta   +5 more
core   +1 more source