Tetracyclic π‐Extended Multi‐Resonant TADF Emitters for Green PSF‐OLEDs With 37.7% EQE and BT.2020‐Compatible Top‐Emitting Devices
In phosphorescence/TADF‐sensitized fluorescence (PSF/TSF) OLEDs, the use of multi‐resonance (MR) emitters as terminal emitters enables the simultaneous achievement of high color purity and high device efficiency. However, achieving both properties simultaneously remains a significant challenge. Herein, we developed a s...