Bipolar blue fluorescent materials capable of bipolar charge transport and possessing high photoluminescence quantum yields have paved the way for the development of high-performance and simple structure organic light-emitting devices. Bipolar blue fluorescent materials with the general architecture of “donor-π bridge-acceptor” mainly include diphenyl phosphoryl/sulfonyl based compounds, dimesitylboryl-based compounds, five-membered heterocyclic based compounds, six-membered N-heterocyclic based compounds, their molecular structure and device performances are reviewed in this article, materials without the “D-π-A” structure are also introduced. In addition, materials with thermally activated delayed fluorescence properties, which have received much attention, are summarized. Finally, the challenges and prospective tendency of the bipolar blue fluorescent materials are given based on the current research.

Contents
1 Introduction
2 D-π-A type bipolar blue fluorescent materials
2.1 Diphenyl phosphoryl/sulfonyl based compounds
2.2 Dimesitylboryl-based compounds
2.3 Five-membered heterocyclic based compounds
2.4 Six-membered N-heterocyclic based compounds
2.5 Other D-π-A type bipolar compounds
3 Non D-π-A type bipolar blue fluorescent materials
4 Bipolar blue fluorescent materials with thermally activated delayed fluorescence properties
5 Problems and outlook