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Modulating Charge-Transfer Excited States of Multiple Resonance Emitters via Intramolecular Covalent Bond Locking.
Huang, Tingting; Xu, Yincai; Lu, Xueying; Qu, Yupei; Wei, Jinbei; Wang, Yue.
Afiliación
  • Huang T; Jilin University, Department of Chemistry, CHINA.
  • Xu Y; Jilin University, Department of Chemistry, CHINA.
  • Lu X; Jilin University, Department of Chemistry, CHINA.
  • Qu Y; Jilin University, Department of Chemistry, CHINA.
  • Wei J; Jilin University, Department of Chemistry, CHINA.
  • Wang Y; Jilin University, State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, P. R. China, 130012, Changchun, CHINA.
Angew Chem Int Ed Engl ; : e202411268, 2024 Jul 18.
Article en En | MEDLINE | ID: mdl-39030797
ABSTRACT
Advanced multiple resonance thermally activated delayed fluorescence (MR-TADF) emitters with high efficiency and color purity have emerged as a research focus in developing ultra-high-definition displays. Herein, we disclose an approach to modulate charge-transfer excited states of MR emitters via intramolecular covalent bond locking. This strategy can promote the evolution of strong intramolecular charge transfer (ICT) states into weak ICT states, ultimately narrowing the full-width at half-maximum (FWHM) of emitters. To modulate the ICT intensity, two octagonal rings are introduced to yield molecule m-DCzDAz-BNCz. Compounds m-CzDAz-BNCz and m-DCzDAz-BNCz exhibit bright light-green and green fluorescence in toluene, with emission maxima of 504 and 513 nm, and FWHMs of 28 and 34 nm, respectively. Sensitized organic light-emitting diodes (OLEDs) employing emitters m-CzDAz-BNCz and m-DCzDAz-BNCz exhibit green emission with peaks of 508 and 520 nm, Commission Internationale de L'Eclairage (CIE) coordinates of (0.12, 0.65) and (0.19, 0.69), and maximum external quantum efficiencies (EQEs) of 30.2% and 32.6%, respectively.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Angew Chem Int Ed Engl Año: 2024 Tipo del documento: Article País de afiliación: China Pais de publicación: Alemania