Reduced Intrinsic Non-Radiative Losses Allow Room-Temperature Triplet Emission from Purely Organic Emitters
dc.bibliographicCitation.firstPage | 2101844 | eng |
dc.bibliographicCitation.issue | 39 | |
dc.bibliographicCitation.journalTitle | Advanced materials | eng |
dc.bibliographicCitation.volume | 33 | eng |
dc.contributor.author | Li, Yungui | |
dc.contributor.author | Jiang, Lihui | |
dc.contributor.author | Liu, Wenlan | |
dc.contributor.author | Xu, Shunqi | |
dc.contributor.author | Li, Tian-Yi | |
dc.contributor.author | Fries, Felix | |
dc.contributor.author | Zeika, Olaf | |
dc.contributor.author | Zou, Yingping | |
dc.contributor.author | Ramanan, Charusheela | |
dc.contributor.author | Lenk, Simone | |
dc.contributor.author | Scholz, Reinhard | |
dc.contributor.author | Andrienko, Denis | |
dc.contributor.author | Feng, Xinliang | |
dc.contributor.author | Leo, Karl | |
dc.contributor.author | Reineke, Sebastian | |
dc.date.accessioned | 2021-12-06T08:11:11Z | |
dc.date.available | 2021-12-06T08:11:11Z | |
dc.date.issued | 2021 | |
dc.description.abstract | Persistent luminescence from triplet excitons in organic molecules is rare, as fast non-radiative deactivation typically dominates over radiative transitions. This work demonstrates that the substitution of a hydrogen atom in a derivative of phenanthroimidazole with an N-phenyl ring can substantially stabilize the excited state. This stabilization converts an organic material without phosphorescence emission into a molecular system exhibiting efficient and ultralong afterglow phosphorescence at room temperature. Results from systematic photophysical investigations, kinetic modeling, excited-state dynamic modeling, and single-crystal structure analysis identify that the long-lived triplets originate from a reduction of intrinsic non-radiative molecular relaxations. Further modification of the N-phenyl ring with halogen atoms affects the afterglow lifetime and quantum yield. As a proof-of-concept, an anticounterfeiting device is demonstrated with a time-dependent Morse code feature for data encryption based on these emitters. A fundamental design principle is outlined to achieve long-lived and emissive triplet states by suppressing intrinsic non-radiative relaxations in the form of molecular vibrations or rotations. | eng |
dc.description.version | publishedVersion | eng |
dc.identifier.uri | https://oa.tib.eu/renate/handle/123456789/7639 | |
dc.identifier.uri | https://doi.org/10.34657/6686 | |
dc.language.iso | eng | eng |
dc.publisher | Weinheim : Wiley-VCH | eng |
dc.relation.doi | https://doi.org/10.1002/adma.202101844 | |
dc.relation.essn | 1521-4095 | |
dc.rights.license | CC BY-NC 4.0 Unported | eng |
dc.rights.uri | https://creativecommons.org/licenses/by-nc/4.0/ | eng |
dc.subject.ddc | 540 | eng |
dc.subject.ddc | 660 | eng |
dc.subject.other | non-radiative loss | eng |
dc.subject.other | phenanthroimidazole | eng |
dc.subject.other | room-temperature phosphorescence | eng |
dc.subject.other | triplet emission | eng |
dc.title | Reduced Intrinsic Non-Radiative Losses Allow Room-Temperature Triplet Emission from Purely Organic Emitters | eng |
dc.type | Article | eng |
dc.type | Text | eng |
tib.accessRights | openAccess | eng |
wgl.contributor | IPF | eng |
wgl.subject | Chemie | eng |
wgl.type | Zeitschriftenartikel | eng |
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