التفاصيل البيبلوغرافية
| العنوان: |
Fluorinated dibenzo[a,c]-phenazine-based green to red thermally activated delayed fluorescent OLED emitters |
| المؤلفون: |
Hong, Gloria, Si, Changfeng, Gupta, Abhishek Kumar, Bizzarri, Claudia, Nieger, Martin, Samuel, Ifor D. W., Zysman-Colman, Eli, Brase, Stefan |
| المساهمون: |
Department of Chemistry |
| بيانات النشر: |
Royal Society of Chemistry |
| سنة النشر: |
2023 |
| المجموعة: |
Helsingfors Universitet: HELDA – Helsingin yliopiston digitaalinen arkisto |
| مصطلحات موضوعية: |
MOLECULAR DESIGN, DERIVATIVES, TADF, 116 Chemical sciences |
| الوصف: |
Purely organic thermally activated delayed fluorescence (TADF) emitting materiaLs for organic Light-emitting diodes (OLEDs) enable a facile method to modulate the emission color through judicious choice of donor and acceptor units. Amongst purely organic TADF emitters, the development of TADF molecules that emit at Longer wavelengths and produce high-efficiency devices that show Low efficiency roll-off remains a challenge. We report a modular synthesis route that delivers three structurally related fluorinated dibenzo[a,c]-phenazine-based TADF molecules, each bearing two donor moieties with different electron-donating strengths, namely 3,6-bis(3,6-di-tert-butyl-9H-carbazol-9-yl)-10-fluorodi-benzo[a,c]phenazine (2DTCz-BP-F), 3,6- bis(9,9-dimethylacridin-10(9H)-yl)-10-fluorodibenzo[a,c]-phenazine (2DMAC-BP-F) and 10,10'-(10-fluorodibenzo[a,c]phenazine-3,6-diyl)bis(10H-phenoxazine) (2PXZ-BP-F). They exhibit donor strength-controlled color-tuning over a wide color range from green to deep-red with photoluminescence maxima, lambda(PL), of 505 nm, 589 nm, and 674 nm in toluene solution. OLED devices using these TADF materials showed excellent to moderate performance with an EQE(max) of 21.8% in the case of 2DMAC-BP-F, 12.4% for 2PXZ-BP-F and 2.1% with 2DTCZ-BP-F, and associated electroluminescence (EL) emission maxima, lambda(EL), of 585 nm, 605 nm and 518 nm in an mCBP host, respectively. ; Peer reviewed |
| نوع الوثيقة: |
article in journal/newspaper |
| وصف الملف: |
application/pdf |
| اللغة: |
English |
| العلاقة: |
The authors would like to thank the RTG 2039 "Molecular Architectures for Fluorescent Cell Imaging" by the Deutsche Forschungsgemeinschaft (DFG) for financial support. C. S. thanks the China Scholarship Council (201806890001). We thank Dr Tomas Matulaitis for help with Delta E ST measurements. A. K. G. is grateful to the Royal Society for Newton International Fellowship NF171163. We acknowledge support from the UK's Engineering and Physical Sciences Research Council (grants EP/P010482/1 and EP/L017008/1). E. Z.-C. is a Royal Society Leverhulme Trust Senior Research fellow (SRF/R1/201089).; Hong , G , Si , C , Gupta , A K , Bizzarri , C , Nieger , M , Samuel , I D W , Zysman-Colman , E & Brase , S 2022 , ' Fluorinated dibenzo[a,c]-phenazine-based green to red thermally activated delayed fluorescent OLED emitters ' , Journal of Materials Chemistry. C , vol. 12 , pp. 4757-4766 . https://doi.org/10.1039/d1tc04918fTest; ORCID: /0000-0003-1677-0109/work/131058540; e5c89cf0-0905-45df-ab48-9152c1a30143; http://hdl.handle.net/10138/356143Test; 000730378400001 |
| الإتاحة: |
http://hdl.handle.net/10138/356143Test |
| حقوق: |
cc_by ; openAccess ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: |
edsbas.FD50F126 |
| قاعدة البيانات: |
BASE |
