Design, synthesis and optical properties of carbazole-based halogen-bonded organic semiconductors

Organic-semiconductor-based devices show promise as next-generation electronics platform due to low cost, large-scale manufacturing, and flexibility. Among the critical challenges is the control over molecular packing in
organic electronic devices, which dictates properties such as charge-carrier mobility and luminescence efficiency. Offering high purity and well-defined solid-state arrangement, organic crystals are of particular interest for
organic electronic devices.[1] Compared to single-component crystals, co-crystals are more versatile since the properties of the final material could be finely tuned by subtle structural variations of the starting modules.[2]
Being an effective supramolecular tool in crystal engineering,[3] halogen bonding may offer significant advances in devising novel organic electronic materials. Herein, we present our preliminary results on the design and
fabrication of halogen-bonded, carbazole-based luminescent cocrystals.