Overview

• The molecular switch design of CzTRZCN integrates an electron-rich carbazole unit with a triazine core and cyano groups to balance the structural needs for two-photon absorption and thermally activated delayed fluorescence.
• When used in OLED devices, CzTRZCN achieved a 13.5% external quantum efficiency, marking a new high among triazine-based TADF materials.
• Lab measurements confirmed a high two-photon absorption cross-section, indicating strong potential for deep-tissue fluorescence imaging.
• As a metal-free organic compound with low toxicity, CzTRZCN offers high biocompatibility suitable for medical probes and time-resolved fluorescence microscopy.
• Next research phases will focus on broadening emission wavelengths and collaborating on in vivo imaging studies, next-generation OLED implementations and wearable sensor development.