Highly Efficient Carbazole‐<i>π</i>‐Dimesitylborane Bipolar Fluorophores for Nondoped Blue Organic Light‐Emitting Diodes

Abstract

Highly efficient blue emitters based on the Lewis acid–base carbazole-π-dimesitylborane framework are synthesized and characterized. Among four bipolar blue fluorophores, the nondoped OLED fabricated with CzThB exhibits the best performance blue electroluminescence with CIEx, y (0.13,0.21), maximum electroluminance of 28 300 cd m−2 and external quantum efficiency of 6.9%.