High-mobility organic transistors based on single-crystalline microribbons of triisopropylsilylethynyl pentacene via solution-phase self-assembly

The properties of single-crystalline microribbons of triisopropylsilyethynyl pentacene (TIPS-PEN) were analyzed using solution-phase self-assembly. The TIPS-PEN powder acted as the starting material for the TIPS-PEN microribbons in the solution phase. The induction of a small amount of concentrated toluene solution of TIPS-PEN into acetonitrile led to the formation of nanocrystals and the growth of a microribbon in the closed chamber. The presence of an elevated solvent vapor pressure helped in the spontaneous organization of TIPS-PEN molecules into 1D microribbons. The field-effect properties of OFET were measured by the fabrication of TIPS-PEN microribbons on silica substrates. The solvent exchange method proved to be feasible for the fabrication of OFET based on microribbons, which showed excellent performance and high mobility. Results show that the approach can be useful for optoelectronic applications.