Fluorene‐Framework Engineering Enables Narrowband Red Multi‐Resonance Emitters for High‐Efficiency With Negligible Roll‐Off Toward BT.2020
ABSTRACT Red multi‐resonance (MR) emitters are highly desirable for high‐definition OLED displays, yet achieving narrowband emission, high efficiency, and suppressed efficiency roll‐off simultaneously remains a formidable challenge. Herein, we introduce a C‐C bond‐linked fluorene‐framework engineering that modulates th...