Results 91 to 100 of about 1,915,191 (239)

Precisely Regulating 2.45 s Pure Blue Room‐Temperature Phosphorescence via Supramolecular Coordination

Advanced Science, EarlyView.
Herein, a pure deep blue room‐temperature phosphorescence (415 nm) with lifetime up to 2.45 s is successfully achieved by a covalently crosslinking purely organic material based on boric acid (BA) and 3,5‐dicarboxyphenylboronic acid (BOP) through a simple dehydration reaction, which can be adjusted precisely by supramolecular coordination with ...
Jun Wang, Xingting Que, Zhiming Chen, Jingsheng Zhang, Wei‐Lei Zhou, Wen‐Wen Xu   +5 more
wiley   +1 more source

One Molecular Platform, Three Distinct Narrowband Organoboron TADF Emitters: A Divergent One-Pot Strategy From Green to Red. [PDF]

Angew Chem Int Ed Engl
One platform–three emitters: Divergent one‐pot borylation of a single indolocarbazole platform exploits competing mono‐ and double‐borylation pathways to generate three spectrally distinct organoboron MR‐TADF emitters spanning green to red, enabling color‐tunable narrowband OLEDs with external quantum efficiencies over 30%.
Lee JH, Yang M, Yasuda T.
europepmc   +3 more sources

Understanding luminescence of metal-containing thermally activated delayed fluorescence (TADF) luminophores

Inorganic Chemistry Frontiers
We present a critical review of metal TADF luminophores highlighting a balance between TADF and phosphorescence in these systems.
Lubna Salah, Paulina Marek-Urban, Mieczysław Łapkowski, Fernando B. Dias, Piotr Pander   +4 more
openaire   +1 more source

Acceptor-Donor-Acceptor π-Stacking Boosts Intramolecular Through-Space Charge Transfer towards Efficient Red TADF and High-Performance OLEDs

Research, 2022
Organic push-pull systems featuring through-space charge transfer (TSCT) excited states have been disclosed to be capable of exhibiting thermally activated delayed fluorescence (TADF), but to realize high-efficiency long-wavelength emission still remains
Chenglin Jiang, Jingsheng Miao, Danwen Zhang, Zhenhua Wen, Chuluo Yang, Kai Li   +5 more
doaj   +1 more source

Cavity‐Compatible Light Extraction in Top‐Emitting Microcavity OLEDs via a Gentle Internal Corrugation Layer and Resonance‐Matched Narrowband Emission

Advanced Science, EarlyView.
A gentle internal corrugation layer conformally reshapes the microcavity OLED stack, redistributing confined optical power toward extractable channels while preserving cavity‐controlled emission. Combined with optical clear resin and a resonance‐matched narrowband pTSF emissive system, this cavity‐compatible architecture delivers an external quantum ...
Young Rok Kim, Ajay Nimbalkar, Min Chul Suh   +2 more
wiley   +1 more source

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

Photophysics of thermally activated delayed fluorescence molecules [PDF]

, 2017
Thermally activated delayed fluorescence (TADF) has recently emerged as one of the most attractive methods for harvesting triplet states in metal-free organic materials for application in organic light emitting diodes (OLEDs).
Monkman, Andrew P., Penfold, Thomas J., Andrew P Monkman, Dias, Fernando B., Fernando B Dias, Thomas J Penfold   +5 more
core   +1 more source

Comparison of the Performance of Fluorescent, Phosphorescent, and TADF Luminophores for Explosives Sensing

Advanced Sensor Research
This study investigates how the emission mechanism (fluorescence, phosphorescence, or thermally activated delayed fluorescence, TADF) of a luminescence‐quenching chemical sensor influences the sensitivity of explosives detection.
Michele Duarte Tonet, Graham A. Turnbull, Eli Zysman‐Colman   +2 more
doaj   +1 more source

Isotope Effect of Host Material on Device Stability of Thermally Activated Delayed Fluorescence Organic Light‐Emitting Diodes

Small Science, 2021
Organic light‐emitting diodes (OLEDs) exhibiting thermally activated delayed fluorescence (TADF) have attracted great interest because of their excellent exciton harvesting ability in electroluminescence (EL).
Xuelong Liu, Chin-Yiu Chan, Fabrice Mathevet, Masashi Mamada, Youichi Tsuchiya, Yi-Ting Lee, Hajime Nakanotani, Shinichiro Kobayashi, Masayuki Shiochi, Chihaya Adachi   +9 more
doaj   +1 more source

Modulation of delayed fluorescence pathways via rational molecular engineering

Nature Communications
One of the key challenges in developing efficient organic light-emitting diodes (OLEDs) is overcoming the loss channel of triplet excitons. A common approach to mitigate these losses to enhance the external quantum efficiency of OLEDs is employing ...
Sanchari Debnath, Pria Ramkissoon, Ulrike Salzner, Christopher R. Hall, Naitik A. Panjwani, Woojae Kim, Trevor A. Smith, Satish Patil   +7 more
doaj   +1 more source