Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters

Klimash, Anastasia; Pander, Piotr Henryk; Klooster, Wim; Coles, Simon; Data, Przemyslaw; Dias, Fernando; Skabara, Peter

Abstract

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%.

Citation

Klimash, A., Pander, P. H., Klooster, W., Coles, S., Data, P., Dias, F., & Skabara, P. (2018). Intermolecular Interactions in Molecular Crystals and Their Effect on Thermally Activated Delayed Fluorescence of Helicene-Based Emitters. Journal of Materials Chemistry C Materials for optical and electronic devices, 6(39), 10557-10568. https://doi.org/10.1039/c8tc03390k

• Journal Article Type: Article
• Acceptance Date: Sep 11, 2018
• Online Publication Date: Sep 12, 2018
• Publication Date: Oct 21, 2018
• Deposit Date: Sep 14, 2018
• Publicly Available Date: Sep 14, 2018
• Journal: Journal of Materials Chemistry C Materials for optical and electronic devices
• Print ISSN: 2050-7526
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 6
• Issue: 39
• Pages: 10557-10568
• DOI: https://doi.org/10.1039/c8tc03390k
• Public URL: https://durham-repository.worktribe.com/output/1320122