Oxygen-Bridged Boron Derivatives as Electron Transport and Thermally Activated Delayed Fluorescence Host Materials for High-Performance Phosphorescent Organic Light-Emitting Diodes

Oxygen-bridged boron (BO) derivatives, 3,11-di(9H-carbazol-9-yl)-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene (p-BO-2Cz) and 2,12-di(9H-carbazol-9-yl)-5,9-dioxa-13b-boranaphtho[3,2,1-de]anthracene (m-BO-2Cz), were successfully developed as n-type (electron transport type) hosts with thermally activated delayed fluorescence (TADF) characteristics. These hosts were created by...