Development of TADF red emitters based on the structure of curcuminoids Daria Grzywacz 1,2 , Michał Mońka 2 , Estera Hoffman 2 , Beata Liberek 1 , P. Bojarski 2 , Illia E. Serdiuk 2 1 Faculty of Chemistry, University of Gdansk, Wita Stwosza 63, 80-308 Gdansk, Poland 2 Faculty of Mathematics, Physics and Informatics, University of Gdansk, Wita Stwosza 57, 80-308 Gdansk, Poland The thermally activated delayed fluorescence emitters (TADFs) are currently a hotspot in organic light-emitting diode (OLED) research. Organic dyes can effectively generate electroluminescence in the visible wavelengths, but OLEDs still perform poorly in the red/ near-infrared region (above 700 nm). Therefore, the development of efficient NIR TADF materials remains a major challenge. Curcuminoids are a relatively small class of plant secondary metabolites. In addition to their well-known biological activities, these compounds have attracted considerable interest due to their unique photophysical, and photochemical properties promising for application in optoelectronics. In our work, we report the synthesis and photophysical properties of red emitters based on the D-π-A-π-D structure of curcuminoids, containing two triphenylamine (TPA) donor groups and a strong acetylacetonate acceptor unit combined with boron difluoride. Our results disclose a complex structure-property relationship, on the basis of a series curcuminoid derivatives bearing various substituents (e.g. Me, OMe) and heavy atom(s) at different positions of the donor. Financial support: This research was funded by the National Centre for Research and Development (NCBR), Poland within LIDER XI grant (LIDER/47/0190/L-11/19/NCBR/2020). DFT calculations were performed on the computers of the Wroclaw Centre for Networking and Supercomputing (WCSS), Poland.
P23DD
Made with FlippingBook Learn more on our blog