| Title: |
Pure Hydrocarbon Hosts Enabling Efficient Multi‐Resonance TADF Blue‐Emitting Organic Light‐Emitting Diodes |
| Authors: |
Yang, Yue-Jian; Ari, Denis; Yu, Zhe-Hong; Lettelier, Kelvine; Jeannin, Olivier; Zheng, Qi; Khan, Aziz; Quinton, Cassandre; Zhou, Dong-Ying; Zuo-Quan, Jiang; Poriel, Cyril |
| Contributors: |
Soochow University; Institut des Sciences Chimiques de Rennes (ISCR); Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes); Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); The authors acknowledge financial findings from the National Natural Science Foundation of China (Nos. 22175124, 62175171 and 61961160731), the Natural Science Foundation of Jiangsu Province of China (BK20220057). This work is also supported by Suzhou Key Laboratory of Functional Nano & Soft Materials,Collaborative Innovation Center of Suzhou Nano Science & Technology, the 111 Project. This work has also been financially supported by the ANR (ANR-22-CE07-0024-Evolution Project). DA thanks the EUR LUMOMAT project and the Investments for the Future program ANR-18-EURE-0012 (PIPPIN) for a Ph.D. grant. KL thanks the Region Bretagne for a PhD Grant (Project SIMPLIFY). We also thank the CRMPO (Rennes) for mass analyses and GENCI (Project N° AD010814136) for computing time; ANR-22-CE07-0024,Skelet_CyProp,Réorganisation de bicycles cyclopropaniques(2022); ANR-18-EURE-0012,LumoMat-E,Molecular Materials for Organic Electronics/Photonics(2018) |
| Source: |
ISSN: 1433-7851. |
| Publisher Information: |
CCSD; Wiley-VCH Verlag |
| Publication Year: |
2025 |
| Subject Terms: |
pure hydrocarbon host; organic light-emitting diode; phosphorescence-sensitized; multi-resonance thermallyactivated delayed fluorescent; [CHIM.ORGA]Chemical Sciences/Organic chemistry; [CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry; [SPI.TRON]Engineering Sciences [physics]/Electronics |
| Description: |
International audience ; Pure hydrocarbon (PHC) materials are a class of highly efficient and stable host materials for organic light‐emitting diodes (OLEDs), composed solely of carbon and hydrogen atoms. Despite recent great advancements in PHC research, their applications are still mainly limited to phosphorescent OLEDs (PHOLEDs). Thus, expanding PHC materials into other types of OLEDs is critical for advancing organic electronics. In this study, we designed a series of high‐triplet PHC materials based on a multi‐substitution approach of the 9,9'‐spirobifluorene (SBF) backbone and used them, for the first time, as host in blue‐emitting phosphorescence‐sensitized multi‐resonance thermally activated delayed fluorescence (MR‐TADF) OLEDs. Devices based on 2,6‐Bis(3,6‐di‐tert‐butyl‐9H‐carbazol‐9‐yl)boron (DtBuCzB) emitter, using FIrpic or fac‐Ir(tpz)3 as the sensitizer, achieved high maximum external quantum efficiency (EQEmax) values ranging from 29.1% to 33.9%. Additionally, blue MR‐TADF OLED devices based on v‐DABNA with a phosphorescent sensitizer (CN‐Ir), demonstrated outstanding electroluminescent performance, with EQEmax of approximately 31% notably due to an excellent molecular orientation induced by the PHC hosts. All devices exhibited narrow full‐width at half‐maximum spectra and minimal efficiency roll‐off. This study marks the first application of PHC hosts in phosphorescence‐sensitized MR‐TADF OLEDs, highlighting their potential as promising candidates for the next‐generation of blue OLEDs |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
info:eu-repo/semantics/altIdentifier/pmid/40008831; PUBMED: 40008831 |
| DOI: |
10.1002/anie.202501895 |
| Availability: |
https://hal.science/hal-04987850; https://hal.science/hal-04987850v1/document; https://hal.science/hal-04987850v1/file/manuscript%20ACIErevised-without%20highlight.pdf; https://doi.org/10.1002/anie.202501895 |
| Rights: |
http://creativecommons.org/licenses/by/ ; info:eu-repo/semantics/OpenAccess |
| Accession Number: |
edsbas.5BE2011C |
| Database: |
BASE |