Synthesis, Electrochemical Behavior, and Electronic Properties of Hyperbranched Poly(p-methylenetriphenylamine): An Unexpected Condensation Polymerization from N-[4-(Tosyloxybutyloxymethyl)phenyl]-N,N-diphenylamine

Abstract

phenyl]-N,N-diphenylamine showed unexpected chemical reactivity and polymerized to form hyperbranched poly(p-methylenetriphenylamine) (PMTPA) under neat conditions. The hyperbranched PMTPA was electrochemically active and could be deposited on electrode surface when oxidized. The SEM study revealed that electropolymerization of PMTPA would form uniform coating on ITO surface. Polymeric light-emitting diodes (PLEDs) employing the electroactive hyperbranched PMTPA as hole-transport layer in ITO/electrochemically polymerized HTL/EML(PVK-PBD-Ir(ppy) 3 )/Mg/Ag demonstrated the brightness over 20 000 cd/m 2 and low turn-on voltage. In particular, the device performance was very steady regardless of the thickness of the PMTPA layer, ranging from 4 to 10 nm.

Cross‐Linked Multifunctional Conjugated Polymers Prepared by In Situ Electrochemical Deposition for a Highly‐Efficient Blue‐Emitting and Electron‐Transport Layer

“…The PFCzPO ED film has a RMS roughness of 3.64 nm, which is analogous to the film morphology obtained after spin‐coating from solution. The morphology of ED films is greatly improved compared to previously reported polymer ED films 8–12. We point out that this is the first ED film using a CP precursor that exhibits such a smooth morphology.…”

“…There are only a few reports about ED that use CPs as precursors 8–12. However, resultant ED films showed a very rough morphology and weak fluorescence, which makes it difficult to use them for the application in devices.…”

“…One important factor to obtain a high‐quality ED film is ED under low potential, which benefits the doping/dedoping process. The previous reported ED of CPs precursors usually required a high oxidation potential applied during the ED process because the CPs precursors with low solubility showed low electroactivity 8–12. But ED under a very high oxidation potential will lead to more structural defects and high electrolyte doping level, which will obviously affect the optoelectronic functions, especially the luminescent properties of ED films.…”

Synthesis and characterization of novel hydroxyl-terminated hyperbranched polyurethanes

“…HBPs with a large number of reactive end groups, have a higher chemical reactivity [11] compared to linear polymers. End groups of HBPs are very important for application.…”

Synthesis of Diblock Copolymer Consisting of Poly(4-butyltriphenylamine) and Morphological Control in Photovoltaic Application

“…The functional polymers based on aromatic amines such as triphenylamine or carbazole have been widely developed for electronic devices [30][31][32][33][34][35][36][37]. The block copolymers containing triphenylamine and perylenediimide as side groups were also prepared [14,15].…”