Sterically Tuned Ortho-Phenylene-Linked Donor–Acceptor Benzothiazole-Based Boron Difluoride Complexes as Thermally-Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodes

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dc.contributor.authorKutsiy, Stepan
dc.contributor.authorVolyniuk, Dmytro
dc.contributor.authorRanjan Sahoo, Smruti
dc.contributor.authorCeborska, Magdalena
dc.contributor.authorWisniewska, Agnieszka
dc.contributor.authorStakhira, Pavlo
dc.contributor.authorGrazulevicius, Juozas Vidas
dc.contributor.authorBaryshnikov, Glib V.
dc.contributor.authorPotopnyk, Mykhaylo A.
dc.contributor.organizationInstitute of Organic Chemistry, Polish Academy of Sciences
dc.contributor.organizationDepartment of Electronic Devices, Lviv Polytechnic National University, Ukraine
dc.contributor.organizationDepartment of Polymer Chemistry and Technology, Kaunas University of Technology, Lithuania
dc.contributor.organizationLaboratory of Organic Electronics, Department of Science and Technology, Linköping University, Sweden
dc.contributor.organizationDepartment of Physics and Astronomy, Uppsala University, Sweden
dc.contributor.organizationFaculty of Mathematics and Natural Sciences, Cardinal Stefan Wyszyński University
dc.contributor.organizationInstitute of Physical Chemistry, Polish Academy of Sciences
dc.contributor.organizationInstitute of Organic Chemistry, National Academy of Sciences of Ukraine
dc.date.accessioned2024-11-18T13:43:47Z
dc.date.available2024-11-18T13:43:47Z
dc.date.issued2024
dc.description.abstractTwo donor–acceptor dyes with an ortho-phenylene-linked carbazole electron donor and a benzothiazole-fused boron heterocyclic acceptor were designed, synthesized, and spectroscopically investigated. Due to the steric effects of boron heterocyclic units, the dyes demonstrate different conformations in the crystalline state. The presence of numerous hydrogen-bonding intermolecular interactions and the very weak π–π stacking in the molecular packing results in intense solid-state emission with photoluminescence quantum yields of 40 and 18% for crystals and 50 and 42% for host-based light-emitting layers. The compounds show aggregation-induced emission and thermally activated delayed fluorescence (TADF). The received ionization potential and electron affinity values suggested good charge-injecting ability and bipolar charge-transporting properties of the developed dyes. Transport of holes and electrons was detected in layers of one dye by the time-of-flight measurements. The benzothiazole-based boron difluoride complexes showed high electron mobility of 1.5 × 10–4 and 0.7 × 10–4 cm2 V–1 s–1 at an electric field of 1.35 × 106 V cm–1. Therefore, these dyes were successfully applied as emitters in organic light-emitting diodes with external quantum efficiencies of 15 and 13%, respectively. Our study marks a critical advancement in the area of solid-state emissive boron difluoride dyes, which can be applied as TADF emitters into organic light-emitting diodes. The obtained results reveal that the orientation of the acceptor unit in the ortho-phenylene-linked donor–acceptor dyes makes a significant impact on the TADF activity.en
dc.description.sponsorship“Long-term program of support of the Ukrainian research teams at the Polish Academy of Sciences carried out in collaboration with the U.S. National Academy of Sciences with the financial support of external partners”; National Supercomputer Centre (NSC) through the project LiU-compute-2024-14, funded by the Linköping University; Research Council of Lithuania (S-MIP-24-2)
dc.identifier.citationACS Appl. Mater. Interfaces 2024, 16, 44, 60633–60647 // https://doi.org/10.1021/acsami.4c12662
dc.identifier.doi10.1021/acsami.4c12662
dc.identifier.issn1944-8244
dc.identifier.issn1944-8252
dc.identifier.urihttps://open.icm.edu.pl/handle/123456789/25095
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.rightsUznanie autorstwa 4.0 Międzynarodoween
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceACS Applied Materials and Interfaces
dc.subjectorganoboron dyeen
dc.subjectcarbazoleen
dc.subjectspin−orbit couplingen
dc.subjectaggregation-induced emissionen
dc.subjectsolid-state luminescenceen
dc.titleSterically Tuned Ortho-Phenylene-Linked Donor–Acceptor Benzothiazole-Based Boron Difluoride Complexes as Thermally-Activated Delayed Fluorescence Emitters for Organic Light-Emitting Diodesen
dc.typearticle
dc.type.versionpublishedVersion
person.identifier.orcidPotopnyk, Mykhaylo A. [0000-0002-4543-2785]
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