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Updated: Jan 14, 2026

Production and Characterization of Vacuum Deposited Organic Light Emitting Diodes
Published on: November 16, 2018
Donor-Acceptor Boron Difluoride Complexes for Bipolar Exciplex Emitters in Organic Light-Emitting Diodes
Stepan Kutsiy1,2, Oleksandr Bezvikonnyi3, Andrii Hotynchan4
1Institute of Organic Chemistry, Polish Academy of Sciences, Kasprzaka 44/52, Warsaw, 01-224, Poland.
Abstract:
Four 1,3-thiazole/selenazole-containing boron difluoride complexes with donor-acceptor architectures were designed, synthesized, and thoroughly spectroscopically characterized. X-ray crystallographic analysis revealed that in the solid state the molecules adopt twisted conformations that effectively suppress detrimental π-π stacking. At the same time, numerous intermolecular hydrogen-bonding interactions stabilize the packing, leading to remarkably high solid-state photoluminescence quantum yields of up to 37%. Consistent with these structural features, the dyes exhibit clear aggregation-induced emission enhancement in tetrahydrofuran-water mixtures. Beyond their photophysical properties, the complexes also demonstrate favorable semiconducting behavior. When incorporated as exciplex-forming emitters in organic light-emitting diodes, they enabled efficient device operation with external quantum efficiencies reaching up to 14.9%.
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