Quinoidal oligoquinoline: a novel quinodimethane exhibiting high electroluminescence efficiency and p-channel field effect charge transport.

A novel tetraphenylquinodimethane based on electron-deficient 4-phenylquinoline oligomer displayed an unusually low ionization potential and was used as a p-channel semiconductor in thin-film transistors and as an emitter to achieve very bright and high efficiency green light-emitting diodes.