Highly aligned conjugated polymer films prepared by rotation coating for high-performance organic field-effect transistors

摘要

Recently, exceptionally high field-effect mobility in organic field-effect transistors (OFETs) has been fabricated using semiconducting films with one-dimensionally aligned, highly planar electron donor-acceptor copolymers, within the channel of transistors. Here, we propose an extremely simple coating method, called rotation coating, for preparing highly aligned, conjugated polymer thin films for applications in various organic electronic devices. We realize highly aligned polymer films using various conjugated polymers and applied the films as active layers for high-performance OFETs. Significantly high field-effect mobility values of 1.45 ±0.46cm~2/Vs have been achieved for rotation coated diketopyrrolopyrrole-thieno[3,2-b]thiophene copolymer films.