The invention concerns new organic compounds exhibiting thermally activated delayed fluorescence (TADF) and luminescent compositions based on these compounds. The emitters are designed to enable fast triplet-to-singlet conversion, yielding high photoluminescence quantum efficiency and short delayed fluorescence lifetimes.
The introduction of ortho-substituents and modified donor–acceptor linkers leads to improved TADF performance across the entire spectral range, from blue to near infrared. Compositions containing these emitters can be combined with narrow-band fluorophores, providing high color purity and excellent material stability.
The invention includes the molecular structures, synthesis methods and luminescent compositions for next-generation OLED devices.
Application:
- High-performance emissive layers for OLED,
- Light-emitting compositions across a broad spectral range,
- Materials for narrow-band hyperfluorescent OLEDs.
