| 초록 |
Polymer-based light-emitting diodes (PLEDs) containing TADF emitters show great potential as light-emitting devices that can be fabricated by solution processes with simple device structures. To develop efficient TADF-PLED, a polymer host with a good carrier transport ability and an appropriate energy level for a TADF emitter should be designed. In this work, we synthesized the series of the carbazole-based unipolar/bipolar homopolymers. Carbazole has been the most polular building block to obtain high triplet energy and high quantum efficiency in green TADF. However, the carbazole moiety showed poor electron-accepting properties in spite of its good electron donating properties for stable cation radical formation. Therefore, α-Carboline was developed as a building block to improve the poor electron-accepting properties of the carbazole moiety. Here, we report the design, synthesis, and photophysical properties of bipolar polymeric host materials, respectively. |
