Perfluorocyclobutane‐Based Arylamine Hole‐Transporting Materials for Organic and Polymer Light‐Emitting Diodes

Abstract A series of in‐situ thermally polymerizable hole‐transporting materials based on the triarylamine‐containing perfluorocyclobutanes (PFCBs) have been developed and characterized. Electrochemical studies reveal that the energy level of the highest occupied molecular orbital (HOMO) for these materials is between –5.1 and –5.3 eV, which is a good match for the work function of indium tin oxide (ITO), a commonly used anode for organic and polymeric light‐emitting diodes. UV‐vis absorption, photo‐ and electro‐luminescence spectral studies indicate that aggregates are formed during the thermal polymerization. The PFCB‐based materials are very robust after polymerization, which enables the fabrication of multilayer polymer light‐emitting diodes. Highly efficient organic and polymer LEDs are demonstrated using these materials as the hole‐transporting layer, illustrating the superb performance of the PFCB‐based polymers.