Triphenylene‐Involved π‐Extension Combining With Phenyl‐Blocking Enhances the Stability of MR‐TADF Emitter: Top‐Emitting OLED Realizes EQE Approaching 60% With BT.2020 Green Gamut and Long Lifetime

Puntos clave

• This research aims to improve the stability and performance of pure-green MR-TADF emitters by employing specific molecular design strategies.
• Combined moderate π-extension with peripheral phenyl blocking in the design of MR-TADF emitters.
• Evaluated the performance of OLEDs using the designed emitters, focusing on efficiency and longevity.
• Achieved an external quantum efficiency (EQE) approaching 60%.
• OLEDs exhibited performance within the BT.2020 green gamut.