Air stability of n-channel organic transistors based on nickel coordination compounds

A series of tetraphenyl nickel dithiolene complexes, 1, are prepared, and the air stability of the n-channel organic field-effect transistors (OFET) is investigated. The fluoro and trifluoromethyl derivatives with reduction potentials higher than 0 V afford reasonably air-stable n-channel OFET. Metallic organic charge-transfer complex (TTF)(TCNQ) (TTF: tetrathiafulvalene and TCNQ: tetracyanoquinodimethane) is used as source and drain electrodes, and realizes n-channel transistor properties even when Al electrodes do not work.