Engineering Intermolecular Packing Mode of Oxygen‐Bridged Cyclized Boron‐Based MR‐TADF Emitters Enables High‐Efficiency Deep‐Blue Narrowband OLEDs. - Liu, Yuchao; Li, Shengyu; Zhao, Jinyang; Ping, Wei; Yang, Zhi; Hua, Lei; Wang, Junjie; Ying, Shian; Ren, Zhongjie; Yan, Shouke (Angewandte Chemie International Edition, 2025)