Results 11 to 20 of about 2,241 (207)

A Computational Descriptor Analysis on Excited State Behaviours of a Series of TADF and Non-TADF Compounds [PDF]

Physical Chemistry Chemical Physics, 2021
The thermally activated delayed fluorescence (TADF) behaviours of seventeen organic TADF emitters and two non-TADF chromophores bearing various donor and acceptor moieties were investigated, focusing on their torsion angles, singlet-triplet gap (ΔEST), spin orbit couplings (SOC) and topological ΦS index. Electronic structure calculations were performed
Pelin Ulukan, Ekin Esme Bas, Rengin Busra Ozek, Cansul Dal Kaynak, Antonio Monari, Viktorya Aviyente, Saron Catak   +6 more
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Maximizing TADF via Conformational Optimization [PDF]

The Journal of Physical Chemistry A, 2021
e investigate a new strategy to enhance thermally activated delayed fluorescence (TADF) in organic light-emitting diodes (OLEDs). Given that the TADF rate of a molecule depends on its conformation, we hypothesize that there exists a conformation that maximizes the TADF rate.
Changhae Andrew Kim, Troy Van Voorhis
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Unified Framework for Photophysical Rate Calculations in TADF Molecules [PDF]

Journal of Chemical Theory and Computation, 2021
One of the challenges in organic light emitting diodes research is finding ways to increase device efficiency by making use of the triplet excitons that are inevitably generated in the process of electroluminescence. One way to do so is by thermally activated delayed fluorescence, a process in which singlet excitons undergo up-conversion to singlet ...
Leonardo Evaristo de Sousa, Piotr de Silva   +1 more
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Strongly Luminescent Tetradentate Palladium(II)‐TADF Emitters. Blue TADF And TADF‐Sensitized OLEDs with External Quantum Efficiencies Over 23%

Advanced Optical Materials, 2023
AbstractDue to the low‐lying Pd(4d)‐orbitals, luminescent palladium(II) complexes usually show 3IL phosphorescence (IL = intraligand) with excited state lifetimes in the range of hundreds of microseconds, which limits their application in blue organic light‐emitting diodes (OLEDs).
Man‐Ki Sit, Glenna So Ming Tong, Tsz‐Lung Lam, Gang Cheng, Faan‐Fung Hung, Kwok‐Ming So, Lili Du, Kin‐On Choy, Kam‐Hung Low, Chi‐Ming Che   +9 more
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Emergence of White Organic Light-Emitting Diodes Based on Thermally Activated Delayed Fluorescence

Applied Sciences, 2018
Recently, thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) have attracted both academic and industrial interest due to their extraordinary characteristics, such as high efficiency, low driving voltage, bright ...
Peng Xiao, Ting Dong, Jianing Xie, Dongxiang Luo, Jian Yuan, Baiquan Liu   +5 more
doaj   +1 more source

Dipole Moment‐ and Molecular Orbital‐Engineered Phosphine Oxide‐Free Host Materials for Efficient and Stable Blue Thermally Activated Delayed Fluorescence

Advanced Science, 2022
To utilize thermally activated delayed fluorescence (TADF) technology for future displays, it is necessary to develop host materials which harness the full potential of blue TADF emitters. However, no publication has reported such hosts yet. Although the
Soo‐Ghang Ihn, Daun Jeong, Eun Suk Kwon, Sangmo Kim, Yeon Sook Chung, Myungsun Sim, Jun Chwae, Yasushi Koishikawa, Soon Ok Jeon, Jong Soo Kim, Joonghyuk Kim, Sungho Nam, Inkoo Kim, Sangho Park, Dae Sin Kim, Hyeonho Choi, Sunghan Kim   +16 more
doaj   +1 more source

TADF Dye-Loaded Nanoparticles for Fluorescence Live-Cell Imaging

Frontiers in Chemistry, 2020
Thermally activated delayed fluorescence (TADF) molecules offer nowadays a powerful tool in the development of novel organic light emitting diodes due to their capability of harvesting energy from non-emissive triplet states without using heavy-metal ...
Carina I. C. Crucho, João Avó, Ana M. Diniz, Sandra N. Pinto, José Barbosa, Poppy O. Smith, Mário Nuno Berberan-Santos, Lars-Olof Pålsson, Fernando B. Dias   +8 more
doaj   +1 more source

Longevity gene responsible for robust blue organic materials employing thermally activated delayed fluorescence

Nature Communications, 2023
The 3rd-Gen OLED materials employing thermally-activated delayed fluorescence (TADF) combine advantages of first two for high-efficiency and low-cost devices. Though urgently needed, blue TADF emitters have not met stability requirement for applications.
Qing-Yu Meng, Rui Wang, Yi-Lei Wang, Xing-Wei Guo, Yu-Qi Liu, Xue-Liang Wen, Cheng-Yu Yao, Juan Qiao   +7 more
doaj   +1 more source

Navigating CIE Space for Efficient TADF Downconversion WOLEDs [PDF]

Dyes and Pigments, 2020
Abstract High efficiency orange and green emitting perylene dyes have been synthesized and dispersed in an inert polymer host to form an optical downconversion layer. To avoid dye aggregation and allow controlled colour tuning, this layer was deposited in multiple low-concentration spin-coating steps, directly on top of a high performance blue ...
Aksoy, Erkan, Danos, Andrew, Varlikli, Canan, Monkman, Andrew P.   +3 more
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Benchmarking time-dependent density functional theory for singlet excited states of thermally activated delayed fluorescence chromophores

Physical Review Research, 2022
Thermally activated delayed fluorescence (TADF) is the internal conversion of triplet excitons into singlet excitons via reverse intersystem crossing. TADF can significantly enhance the efficiency of organic light-emitting diodes (OLEDs).
Xiaopeng Wang, Siyu Gao, Mingwen Zhao, Noa Marom   +3 more
doaj   +1 more source