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Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion
Stable deep blue multiresonance emitters with small full width at half maximum (FWHM) are attractive for wide color-gamut organic light-emitting diodes (OLEDs). However, the steric repulsion from the spatially close hydrogens would twist the multiresonance skeletons, causing spectral broadening and...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Association for the Advancement of Science
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10181185/ https://www.ncbi.nlm.nih.gov/pubmed/37172084 http://dx.doi.org/10.1126/sciadv.adh1434 |
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author | Wang, Xiang Wang, Lu Meng, Guoyun Zeng, Xuan Zhang, Dongdong Duan, Lian |
author_facet | Wang, Xiang Wang, Lu Meng, Guoyun Zeng, Xuan Zhang, Dongdong Duan, Lian |
author_sort | Wang, Xiang |
collection | PubMed |
description | Stable deep blue multiresonance emitters with small full width at half maximum (FWHM) are attractive for wide color-gamut organic light-emitting diodes (OLEDs). However, the steric repulsion from the spatially close hydrogens would twist the multiresonance skeletons, causing spectral broadening and molecular instability issues. Here, we strategically introduce a mesitylboron locking unit into a carbazole-embedded multiresonance model emitter, alleviating the hydrogen repulsions and also strengthening the para-positioned weak carbon-nitrogen bond in anionic states. An emission peaking at 452 nm with an FWHM of merely 14 nm and nearly BT.2020 blue chromaticity coordinates are obtained in toluene, affording a high maximum external quantum efficiency of 33.9% in a sensitizing device. Moreover, an impressive LT97 (time to decay to 97% of the initial luminance) of 178 hours at a constant current density of 12 mA/cm(2) was achieved in a stable device with a small y coordinate of 0.057, nearly 20 times longer than the model emitter with even a substantially red-shifted emission. |
format | Online Article Text |
id | pubmed-10181185 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | American Association for the Advancement of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-101811852023-05-13 Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion Wang, Xiang Wang, Lu Meng, Guoyun Zeng, Xuan Zhang, Dongdong Duan, Lian Sci Adv Physical and Materials Sciences Stable deep blue multiresonance emitters with small full width at half maximum (FWHM) are attractive for wide color-gamut organic light-emitting diodes (OLEDs). However, the steric repulsion from the spatially close hydrogens would twist the multiresonance skeletons, causing spectral broadening and molecular instability issues. Here, we strategically introduce a mesitylboron locking unit into a carbazole-embedded multiresonance model emitter, alleviating the hydrogen repulsions and also strengthening the para-positioned weak carbon-nitrogen bond in anionic states. An emission peaking at 452 nm with an FWHM of merely 14 nm and nearly BT.2020 blue chromaticity coordinates are obtained in toluene, affording a high maximum external quantum efficiency of 33.9% in a sensitizing device. Moreover, an impressive LT97 (time to decay to 97% of the initial luminance) of 178 hours at a constant current density of 12 mA/cm(2) was achieved in a stable device with a small y coordinate of 0.057, nearly 20 times longer than the model emitter with even a substantially red-shifted emission. American Association for the Advancement of Science 2023-05-12 /pmc/articles/PMC10181185/ /pubmed/37172084 http://dx.doi.org/10.1126/sciadv.adh1434 Text en Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Physical and Materials Sciences Wang, Xiang Wang, Lu Meng, Guoyun Zeng, Xuan Zhang, Dongdong Duan, Lian Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title | Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title_full | Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title_fullStr | Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title_full_unstemmed | Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title_short | Improving the stability and color purity of a BT.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
title_sort | improving the stability and color purity of a bt.2020 blue multiresonance emitter by alleviating hydrogen repulsion |
topic | Physical and Materials Sciences |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10181185/ https://www.ncbi.nlm.nih.gov/pubmed/37172084 http://dx.doi.org/10.1126/sciadv.adh1434 |
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