Diluting phosphorescent and thermally activated delayed fluorescence emitter molecules in solid-state host matrices has proven to be a useful strategy to hinder self-quenching mechanisms, but host materials must meet several criteria to enable energy efficient and stable OLEDs. Here, the authors report the synthesis of a series of 1,3,5-oxadiazines from a one-pot interrupted Fischer indolization, and demonstrate that they possess highly desirable characteristics as host materials in deep-blue OLED devices.
- Charlotte Riley
- Hwan-Hee Cho
- Alexander S. Romanov