Organic thermally activated delayed fluorescence material with strained benzoguanidine donor.

Organic thermally activated delayed fluorescence (TADF) materials have been widely investigated due to their impressive electronic properties and applied potential for the third generation of organic light-emitting diodes (OLED). We present organic TADF material () based on the strained benzoguanidine donor and compare it with the benchmark carbazole-based material (). Extended π-conjugation in material results in yellow-green luminescence at 512 nm with a fast radiative rate of 5.