Outputs (280)

Separating triplet exciton diffusion from triplet-triplet annihilation by the introduction of a mediator (2024)
Journal Article
Carrod, A., Berghuis, M., Gopalakrishnan, V. N., Monkman, A. P., Danos, A., & Börjesson, K. (online). Separating triplet exciton diffusion from triplet-triplet annihilation by the introduction of a mediator. Chemical Science, https://doi.org/10.1039/d4sc07004f

Triplet–triplet annihilation photon upconversion (TTA-UC) combines the energy of two photons to provide one of higher energy that can be used to drive photochemical or photophysical processes. TTA-UC proceeds at high efficiencies in dilute solution,... Read More about Separating triplet exciton diffusion from triplet-triplet annihilation by the introduction of a mediator.

Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence (2024)
Journal Article
Kuila, S., Miranda-Salinas, H., Eng, J., Li, C., Bryce, M. R., Penfold, T. J., & Monkman, A. P. (2024). Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence. Nature Communications, 15, Article 9611. https://doi.org/10.1038/s41467-024-53740-1

Intramolecular charge transfer (ICT) occurs when photoexcitation causes electron transfer from an electron donor to an electron acceptor within the same molecule and is usually stabilized by decoupling of the donor and acceptor through an orthogonal... Read More about Rigid and planar π-conjugated molecules leading to long-lived intramolecular charge-transfer states exhibiting thermally activated delayed fluorescence.

Strongly fluorescent spiro-type tetracoordinate complexes of dibenzo[ b, e ][1,4]thiaborinine dioxide with functionalized 2-(benzo[ d ]heterazol-2-yl)phenolate ligands displaying TADF (2024)
Journal Article
Urban, M., Wrochna, K., Marek-Urban, P. H., Natkowski, D. R., Woźniak, K., Pander, P., Monkman, A. P., Durka, K., & Luliński, S. (online). Strongly fluorescent spiro-type tetracoordinate complexes of dibenzo[ b, e ][1,4]thiaborinine dioxide with functionalized 2-(benzo[ d ]heterazol-2-yl)phenolate ligands displaying TADF. Journal of Materials Chemistry C Materials for optical and electronic devices, https://doi.org/10.1039/d4tc03450c

A series of eight luminescent tetracoordinate organoboron chelate complexes 7a–7d and 8a–8d, featuring spiro geometry of the boron centre, were synthesized by combining strongly electron-acceptor dibenzo[b, e][1,4]thiaborinine 5,5-dioxide (SO2B) with... Read More about Strongly fluorescent spiro-type tetracoordinate complexes of dibenzo[ b, e ][1,4]thiaborinine dioxide with functionalized 2-(benzo[ d ]heterazol-2-yl)phenolate ligands displaying TADF.

Diffusion‐Free Intramolecular Triplet–Triplet Annihilation Contributes to the Enhanced Exciton Utilization in OLEDs (2024)
Journal Article
Mattiello, S., Danos, A., Stavrou, K., Ronchi, A., Baranovski, R., Florenzano, D., Meinardi, F., Beverina, L., Monkman, A., & Monguzzi, A. (2024). Diffusion‐Free Intramolecular Triplet–Triplet Annihilation Contributes to the Enhanced Exciton Utilization in OLEDs. Advanced Optical Materials, 12(33), Article 2401597. https://doi.org/10.1002/adom.202401597

Triplet–triplet annihilation (TTA), or triplet fusion, is a biexcitonic process in which two triplet‐excited molecules can combine their energy to promote one into an excited singlet state. To alleviate the dependence of the TTA rate and yield on tri... Read More about Diffusion‐Free Intramolecular Triplet–Triplet Annihilation Contributes to the Enhanced Exciton Utilization in OLEDs.

Influence of Multiple rISC Channels on the Maximum Efficiency and Roll-Off of TADF OLEDs (2024)
Journal Article
dos Santos, P. L., de Sa Pereira, D., Oh, C. S., Kukhta, N., Lee, H. L., Lee, J. Y., & Monkman, A. P. (2024). Influence of Multiple rISC Channels on the Maximum Efficiency and Roll-Off of TADF OLEDs. Journal of Physical Chemistry C, 128(39), 16308-16319. https://doi.org/10.1021/acs.jpcc.4c02993

In this work, we look into the detailed photophysical characterization of a multidonor–acceptor (D-A) family of thermally activated delayed fluorescent (TADF) emitters to find correlations with their device performance. Increasing the number of close... Read More about Influence of Multiple rISC Channels on the Maximum Efficiency and Roll-Off of TADF OLEDs.

Aryl-Substituted Acridine Donor Derivatives Modulate the Transition Dipole Moment Orientation and Exciton Harvesting Properties of Donor–Acceptor TADF Emitters (2024)
Journal Article
Crovini, E., Stavrou, K., Sahay, P., Nguyễn, B., Comerford, T., Warriner, S., Brütting, W., Monkman, A., & Zysman-Colman, E. (2024). Aryl-Substituted Acridine Donor Derivatives Modulate the Transition Dipole Moment Orientation and Exciton Harvesting Properties of Donor–Acceptor TADF Emitters. Journal of Physical Chemistry C, 128(34), 14429-14441. https://doi.org/10.1021/acs.jpcc.4c03344

Thermally activated delayed fluorescence (TADF) compounds are highly attractive as sensitizing and emitting materials for organic light-emitting diodes (OLEDs). The efficiency of the OLED depends on multiple parameters, most of which rely on the prop... Read More about Aryl-Substituted Acridine Donor Derivatives Modulate the Transition Dipole Moment Orientation and Exciton Harvesting Properties of Donor–Acceptor TADF Emitters.

Isomeric modulation of thermally activated delayed fluorescence in dibenzo[ a, c ]phenazine-based (deep) red emitters (2024)
Journal Article
Brebels, S., Cardeynaels, T., Jackers, L., Kuila, S., Penxten, H., Salthouse, R. J., Danos, A., Monkman, A. P., Champagne, B. R., & Maes, W. (2024). Isomeric modulation of thermally activated delayed fluorescence in dibenzo[ a, c ]phenazine-based (deep) red emitters. Journal of Materials Chemistry C Materials for optical and electronic devices, 12(25), 9255-9265. https://doi.org/10.1039/d4tc01214c

A series of four emissive regio-isomers are synthesized based on the dibenzo[a, c]phenazine-11,12-dicarbonitrile (DBPzCN) acceptor scaffold and a triphenylamine (TPA) donor. Density functional theory is utilized to compare the relative differences in... Read More about Isomeric modulation of thermally activated delayed fluorescence in dibenzo[ a, c ]phenazine-based (deep) red emitters.

Key requirements for ultraefficient sensitization in hyperfluorescence organic light-emitting diodes (2024)
Journal Article
Stavrou, K., Franca, L. G., Danos, A., & Monkman, A. P. (2024). Key requirements for ultraefficient sensitization in hyperfluorescence organic light-emitting diodes. Nature Photonics, 18(6), 554-561. https://doi.org/10.1038/s41566-024-01395-1

Blue organic light-emitting diode (OLED) technology requires further advancements, and hyperfluorescent (HF) OLEDs have emerged as a promising solution to address stability and colour-purity concerns. A key factor influencing the performance of HF-OL... Read More about Key requirements for ultraefficient sensitization in hyperfluorescence organic light-emitting diodes.

Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule (2024)
Journal Article
Franca, L., Danos, A., Saxena, R., Kuila, S., Stavrou, K., Li, C., …Monkman, A. P. (2024). Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule. Journal of Physical Chemistry Letters, 15(6), 1734-1740. https://doi.org/10.1021/acs.jpclett.4c00030

Optical pump–probe techniques allow for an in-depth study of dark excited states. Here, we utilize them to map and gain insights into the excited states involved in the thermally activated delayed fluorescence (TADF) mechanism of a benchmark TADF emi... Read More about Exploring the Early Time Behavior of the Excited States of an Archetype Thermally Activated Delayed Fluorescence Molecule.

Spin-Vibronic Intersystem Crossing and Molecular Packing Effects in Heavy Atom Free Organic Phosphor. (2024)
Journal Article
Pope, T., Eng, J., Monkman, A., & Penfold, T. J. (2024). Spin-Vibronic Intersystem Crossing and Molecular Packing Effects in Heavy Atom Free Organic Phosphor. Journal of Chemical Theory and Computation, 20(3), 1337–1346. https://doi.org/10.1021/acs.jctc.3c01220

We present a detailed investigation into the excited state properties of a planar symmetric azatriangulenetrione, HTANGO, which has received significant interest due to its high solid-state phosphorescence quantum yield and therefore potential as a... Read More about Spin-Vibronic Intersystem Crossing and Molecular Packing Effects in Heavy Atom Free Organic Phosphor..