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Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs
By inverting the common structural motif of thermally activated delayed fluorescence materials to a rigid donor core and multiple peripheral acceptors, reverse intersystem crossing (rISC) rates are demonstrated in an organic material that enables utilization of triplet excited states at faster rates...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6010696/ https://www.ncbi.nlm.nih.gov/pubmed/29938177 http://dx.doi.org/10.1002/advs.201700989 |
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author | dos Santos, Paloma L. Ward, Jonathan S. Congrave, Daniel G. Batsanov, Andrei S. Eng, Julien Stacey, Jessica E. Penfold, Thomas J. Monkman, Andrew P. Bryce, Martin R. |
author_facet | dos Santos, Paloma L. Ward, Jonathan S. Congrave, Daniel G. Batsanov, Andrei S. Eng, Julien Stacey, Jessica E. Penfold, Thomas J. Monkman, Andrew P. Bryce, Martin R. |
author_sort | dos Santos, Paloma L. |
collection | PubMed |
description | By inverting the common structural motif of thermally activated delayed fluorescence materials to a rigid donor core and multiple peripheral acceptors, reverse intersystem crossing (rISC) rates are demonstrated in an organic material that enables utilization of triplet excited states at faster rates than Ir‐based phosphorescent materials. A combination of the inverted structure and multiple donor–acceptor interactions yields up to 30 vibronically coupled singlet and triplet states within 0.2 eV that are involved in rISC. This gives a significant enhancement to the rISC rate, leading to delayed fluorescence decay times as low as 103.9 ns. This new material also has an emission quantum yield ≈1 and a very small singlet–triplet gap. This work shows that it is possible to achieve both high photoluminescence quantum yield and fast rISC in the same molecule. Green organic light‐emitting diode devices with external quantum efficiency >30% are demonstrated at 76 cd m(−2). |
format | Online Article Text |
id | pubmed-6010696 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-60106962018-06-22 Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs dos Santos, Paloma L. Ward, Jonathan S. Congrave, Daniel G. Batsanov, Andrei S. Eng, Julien Stacey, Jessica E. Penfold, Thomas J. Monkman, Andrew P. Bryce, Martin R. Adv Sci (Weinh) Full Papers By inverting the common structural motif of thermally activated delayed fluorescence materials to a rigid donor core and multiple peripheral acceptors, reverse intersystem crossing (rISC) rates are demonstrated in an organic material that enables utilization of triplet excited states at faster rates than Ir‐based phosphorescent materials. A combination of the inverted structure and multiple donor–acceptor interactions yields up to 30 vibronically coupled singlet and triplet states within 0.2 eV that are involved in rISC. This gives a significant enhancement to the rISC rate, leading to delayed fluorescence decay times as low as 103.9 ns. This new material also has an emission quantum yield ≈1 and a very small singlet–triplet gap. This work shows that it is possible to achieve both high photoluminescence quantum yield and fast rISC in the same molecule. Green organic light‐emitting diode devices with external quantum efficiency >30% are demonstrated at 76 cd m(−2). John Wiley and Sons Inc. 2018-04-16 /pmc/articles/PMC6010696/ /pubmed/29938177 http://dx.doi.org/10.1002/advs.201700989 Text en © 2018 The Authors. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Full Papers dos Santos, Paloma L. Ward, Jonathan S. Congrave, Daniel G. Batsanov, Andrei S. Eng, Julien Stacey, Jessica E. Penfold, Thomas J. Monkman, Andrew P. Bryce, Martin R. Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title | Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title_full | Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title_fullStr | Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title_full_unstemmed | Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title_short | Triazatruxene: A Rigid Central Donor Unit for a D–A(3) Thermally Activated Delayed Fluorescence Material Exhibiting Sub‐Microsecond Reverse Intersystem Crossing and Unity Quantum Yield via Multiple Singlet–Triplet State Pairs |
title_sort | triazatruxene: a rigid central donor unit for a d–a(3) thermally activated delayed fluorescence material exhibiting sub‐microsecond reverse intersystem crossing and unity quantum yield via multiple singlet–triplet state pairs |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6010696/ https://www.ncbi.nlm.nih.gov/pubmed/29938177 http://dx.doi.org/10.1002/advs.201700989 |
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