Results 31 to 40 of about 17,454 (292)

Persistent Dimer Emission in Thermally Activated Delayed Fluorescence Materials [PDF]

The Journal of Physical Chemistry C, 2019
We expose significant changes in the emission color of carbazole-based thermally activated delayed fluorescence (TADF) emitters that arise from the presence of persistent dimer states in thin films and organic light-emitting diodes (OLEDs). Direct photoexcitation of this dimer state in 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN) reveals
Marc K. Etherington, Nadzeya A. Kukhta, Heather F. Higginbotham, Andrew Danos, Aisha N. Bismillah, David R. Graves, Paul R. McGonigal, Nils Haase, Antonia Morherr, Andrei S. Batsanov, Christof Pflumm, Vandana Bhalla, Martin R. Bryce, Andrew P. Monkman   +13 more
openaire   +5 more sources

Insights into enhanced electrochemiluminescence of a multiresonance thermally activated delayed fluorescence molecule

SmartMat, 2023
The electrochemiluminescence (ECL) behavior of a multiresonance thermally activated delayed fluorescence molecule has been investigated for the first time by means of ECL‐voltage curves, newly designed ECL‐time observatory, and ECL spectroscopy.
Liuqing Yang, Lihui Dong, David Hall, Mahdi Hesari, Yoann Olivier, Eli Zysman‐Colman, Zhifeng Ding   +6 more
doaj   +1 more source

Comparative study of thermally activated delayed fluorescent properties of donor–acceptor and donor–acceptor–donor architectures based on phenoxazine and dibenzo[a,j]phenazine

Beilstein Journal of Organic Chemistry, 2022
A new thermally activated delayed fluorescence (TADF) compound based on a donor–acceptor (D–A) architecture (D = phenoxazine; A = dibenzo[a,j]phenazine) has been developed, and its photophysical properties were characterized.
Saika Izumi, Prasannamani Govindharaj, Anna Drewniak, Paola Zimmermann Crocomo, Satoshi Minakata, Leonardo Evaristo de Sousa, Piotr de Silva, Przemyslaw Data, Youhei Takeda   +8 more
doaj   +1 more source

Narrowband Emissive Thermally Activated Delayed Fluorescence Materials

Advanced Optical Materials, 2022
AbstractOrganic thermally activated delayed fluorescence (TADF) materials have attracted significant research interest in the field of organic electronics because of their inherent advantage of 100% exciton utilization capability in organic light‐emitting diodes (OLEDs) without the use of noble metals.
Hyung Jong Kim, Takuma Yasuda
openaire   +1 more source

Operational lifetimes of organic light-emitting diodes dominated by Förster resonance energy transfer

Scientific Reports, 2017
Organic light-emitting diodes are a key technology for next-generation information displays because of their low power consumption and potentially long operational lifetimes.
Hirohiko Fukagawa, Takahisa Shimizu, Yukiko Iwasaki, Toshihiro Yamamoto   +3 more
doaj   +1 more source

High efficiency blue organic light-emitting diodes with below-bandgap electroluminescence

Nature Communications, 2021
Thermally activated delayed fluorescence organic light-emitting diodes (TADF-OLEDs) rely on high triplet energy interlayers to confine excitons, which results in reduced performance.
Maria Vasilopoulou, Abd. Rashid bin Mohd Yusoff, Matyas Daboczi, Julio Conforto, Anderson Emanuel Ximim Gavim, Wilson Jose da Silva, Andreia Gerniski Macedo, Anastasia Soultati, George Pistolis, Fabio Kurt Schneider, Yifan Dong, Polina Jacoutot, Georgios Rotas, Jin Jang, Georgios C. Vougioukalakis, Christos L. Chochos, Ji-Seon Kim, Nicola Gasparini   +17 more
doaj   +1 more source

Highly photoluminescent copper carbene complexes based on prompt rather than delayed fluorescence [PDF]

, 2016
Linear two-coordinate copper complexes of cyclic (alkyl)(amino)-carbenes (CAAC)CuX (X = halide) show photoluminescence with solid-state quantum yields of up to 96%; in contrast to previously reported Cu photoemitters the emission is independent of ...
Alexander S. Romanov, Bonan Zhu, Catalano, Charlotte E. James, Ciaran R. Becker, Clark, Dan Credgington, Dawei Di, Flügge, Hashimoto, Hofbeck, Julio Fernandez-Cestau, Krylova, Le Yang, Leitl, Manfred Bochmann, Marion, Mercs, Mikko Linnolahti, Osawa, Osawa, Ray, Romanov, Soleilhavoup, Uoyama, Visbal, Vogt, Wallesch, Wallesch, Weinberger, Xu, Yersin, Zhang   +32 more
core   +1 more source

Ultrafast Structure and Dynamics in the Thermally Activated Delayed Fluorescence of a Carbene-Metal-Amide [PDF]

, 2018
Thermally activated delayed fluorescence has enormous potential for the development of efficient light emitting diodes. A recently discovered class of molecules (the carbene – metal – amides, CMAs) are exceptionally promising as they combine the small ...
Bochmann, Manfred, Hall, Christopher R., Meech, Stephen R., Romanov, Alexander S.   +3 more
core   +2 more sources

Room temperature triplet state spectroscopy of organic semiconductors [PDF]

, 2013
Organic light-emitting devices and solar cells are devices that create, manipulate, and convert excited states in organic semiconductors. It is crucial to characterize these excited states, or excitons, to optimize device performance in applications like
A Köhler, A Volcker, AA Avdeenko, AF Schwerin, C Bulliard, C Gärtner, D Kasemann, D Levy, DL Dexter, DN Congreve, F Marquez, G Klein, G Oster, G Sauerbrey, GA George, H Uoyama, HA Al-Attar, HP Müller, JJ Donkerbroek, K Goushi, KA Nguyen, M Kasha, M Liedtke, MA Baldo, MA Baldo, MA Baldo, MB Smith, MJ Currie, ML Mueller, MR Padhye, O Bolton, R Schüppel, RG Kepler, S Hirata, S Reineke, S Reineke, S Tokito, SK Kook, ST Roberts, U Sondermann, WA Luhman, WG Herkstroeter, WZ Yuan, Y Hong, Y Kawamura, Y Tomkiewicz, Y Zhang   +46 more
core   +2 more sources

Photophysics of thermally activated delayed fluorescence molecules

Methods and Applications in Fluorescence, 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). A large number of TADF molecules have been reported in the literature with the purpose of enhancing the efficiency of OLEDs by ...
Fernando B Dias, Thomas J Penfold, Andrew P Monkman   +2 more
openaire   +4 more sources