Issue 12, 2022

A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior

Abstract

The 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.

Graphical abstract: A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior

Supplementary files

Article information

Article type
Paper
Submitted
05 okt 2021
Accepted
04 jan 2022
First published
07 jan 2022
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. C, 2022,10, 4831-4836

A solution-processable near-infrared thermally activated delayed fluorescent dye with a fused aromatic acceptor and aggregation induced emission behavior

D. G. Congrave, B. H. Drummond, Q. Gu, S. Montanaro, H. Francis, V. Riesgo-González, W. Zeng, C. S. B. Matthews, S. Dowland, I. A. Wright, C. P. Grey, R. H. Friend and H. Bronstein, J. Mater. Chem. C, 2022, 10, 4831 DOI: 10.1039/D1TC04753A

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