Synergistic Intramolecular Non-Covalent Interactions Enable Robust Pure-Blue TADF emitters

Abstract Stability-issues of organic light-emitting diodes (OLEDs) employing thermally activated delayed fluorescence (TADF) require further advancements, especially in pure-blue range of CIEy80@500 cd m-2 of 109 h with CIEy=0.16. Furthermore, deep-blue TADF-sensitized devices exhibit state-of-the-art LT80@500 cd m-2 of 81 h with CIEy=0.10. Our findings provide new insight into the critical role of Intra-NI in OLED materials and open the way to tackling vexing stability issues for developing robust pure-blue organic emitters and other functional materials.