Outside Front Cover: Complementary Multi‐Resonance Thermally Activated Delayed Fluorescence Design for Blue OLEDs Beyond the Concentration Limit (Angew. Chem. Int. Ed. 7/2026)

A confinement-assisted guided energy transfer (CAGE) system was devised to overcome the limitations in high doping concentration of multi-resonance (MR) emitters. This system facilitates the efficient redistribution of singlet excitons and suppresses the diffusion of triplet excitons with simple modification of the well-known MR emitter, resulting in improved device efficiency and operational lifetime. This new approach represents a promising new starting point for the development of blue OLEDs. More in the Research Article (e19657) by Hyung Suk Kim, Youichi Tsuchiya, Sae Youn Lee, Chihaya Adachi, and co-workers.