Researchers from Kyoto University, have developed a new molecular design concept for MR-TADF OLED emitters, that spatially expands and amplifies the multiple resonance effect.
The new molecule, called m-CzB10-Mes has a nano-carbon framework, with a ladder-type structure, and it achieved an emission bandwidth dramatically smaller than those of conventional multiple resonance emitters. Furthermore, the molecule also exhibits excellent TADF performance.
The researchers say that though the synthesis of “ladder compounds” is challenging, they have successfully introduced ten boron atoms in a single step by employing a one-shot borylation method.