RSC template CAT-3 revised JMCC.pdf (572.89 kB)
Download fileA solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior
journal contribution
posted on 2022-03-10, 14:12 authored by Daniel G Congrave, Bluebell H Drummond, Qinying Gu, Stephanie Montanaro, Haydn Francis, Víctor Riesgo-González, Weixuan Zeng, Campbell SB Matthews, Simon Dowland, Iain Wright, Clare P Grey, Richard H Friend, Hugo BronsteinThe unique synergy of properties offered by an efficient and processable near-infrared thermally activated delayed fluorescent (NIR TADF) dye could be transformative across research fields. Here, a solution-processable NIR TADF material is demonstrated (CAT-TPE). Good solubility is achieved through the use of a new tetraphenylethylene (TPE)-based triphenylamine electron donor. TADF is confirmed through variable temperature time-resolved measurements at a peak photoluminescence (PL) wavelength of 842 nm in a solution-processed film. An OLED with good roll-off characteristics for a solution-processed NIR TADF device is reported with electroluminescence λmax > 700 nm. CAT-TPE also demonstrates classic aggregation induced emission (AIE) behavior, being more emissive when aggregated than in solution with all PL > 700 nm. This work opens the door to the considerably enhanced structural diversity of solution-processable NIR TADF and will inform the design of future high efficiency AIE NIR TADF materials.
Funding
Herchel Smith fund
Control of spin and coherence in electronic excitations in organic and hybrid organic/inorganic semiconductor structures
Engineering and Physical Sciences Research Council
Find out more...European Research Council (ERC)
EPSRC Centre for Doctoral Training in Sustainable and Functional Nano
Engineering and Physical Sciences Research Council
Find out more...Cambridge Trust
China Scholarship Council
Loughborough University
3D-Localisation - Three Dimensionally Defined Non-Fullerene Acceptors
Engineering and Physical Sciences Research Council
Find out more...RSC (grant no. RF19-2751)
Faraday Institution [grant numbers FIRG001 and FIRG024]
History
School
- Science
Department
- Chemistry