Ortho ‐Carborane Decorated Multi‐Resonance TADF Emitters: Preserving Local Excited State and High Efficiency in OLEDs

Abstract: A novel class of o‐carboranyl luminophores, 2CB‐BuDABNA (1) and 3CB‐BuDABNA (2) is reported, in which o‐carborane moieties are incorporated at the periphery of the B,N‐doped multi‐resonance thermally activated delayed fluorescence (MR‐TADF) core. Both compounds maintain the inherent local emission characteristics of their MR‐emitting core, exhibiting intense MR‐TADF with high photoluminescence quantum yields in toluene and rigid states. In contrast, the presence of the dark lowest‐energy charge transfer state, induced by cage rotation in THF, is suggested to be responsible for emission quenching in a polar solvent. Despite the different arrangement of the cage on the DABNA core, both 1 and 2 show red‐shifted emissions compared to the parent compound BuDABNA (3). By utilizing 1 as the emitter, high‐efficiency blue organic light‐emitting diodes (OLEDs) are achieved with a remarkable maximum external quantum efficiency of 25%, representing the highest reported efficiency for OLEDs employing an o‐carboranyl luminophore as the emitter.

Object Details

• Location: Deutsche Nationalbibliothek Frankfurt am Main
• Extent: Online-Ressource
• Language: Englisch

References and Relationships

• Bibliographic citation: Ortho ‐Carborane Decorated Multi‐Resonance TADF Emitters: Preserving Local Excited State and High Efficiency in OLEDs ; day:17 ; month:01 ; year:2024 ; extent:7 ; Advanced science ; (17.01.2024) (gesamt 7)

Contributors, Places and Time

• Creator: Lee, Taehwan ; Jang, Jee‐Hun ; Nguyen, Nhi Ngoc Tuyet ; Jung, Jaehoon ; Lee, Jeong‐Hwan ; Lee, Min Hyung

Further information

• DOI: 10.1002/advs.202309016
• URN: urn:nbn:de:101:1-2024011814022942440306
• Rights: Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
• Last update: 15.08.2025, 7:36 AM CEST