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Durham University

Department of Physics

Staff profile

Publication details for Associate Professor Fernando Dias

Klimash, Anastasia, Pander, Piotr Henryk, Klooster, Wim, Coles, Simon, Data, Przemyslaw, Dias, Fernando & Skabara, Peter (2018). Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters. Journal of Materials Chemistry C 6(39): 10557-10568.

Author(s) from Durham


Here, we discuss the influence of the crystal structure on the photophysical properties of two new TADF emitters containing a non-planar helical moiety. The presence of solvent in the crystal lattice of a diaza[5]helicene-based compound alters molecular packing significantly and suppresses aggregation. This results in more intense TADF emission and an increase in PLQY. Solution-processed OLED devices gave a maximum external quantum efficiency of 7.1%.