Micrometer‐ and Nanometer‐Sized, Single‐Crystalline Ribbons of a Cyclic Triphenylamine Dimer and Their Application in Organic Transistors

Abstract
A cyclic triphenylamine dimer with high crystallinity is demonstrated. Micrometer‐ and nanometer‐sized single‐crystalline ribbons are easily produced by a physical vapor transport technique. Field‐effect transistors of the ribbons exhibit mobilities up to 0.05 cm2 V−1 s−1. The mobility of the devices depends greatly on the size of the ribbons: the smaller the ribbons, the higher the mobility.