| 초록 |
Recently, diketopyrrolopyrrole (DPP)-based copolymers have attracted much attention due to the high hole mobility in thin film transistor (TFT) made of solution processing technology. These copolymers containing the strong symmetric DPP acceptor and π-extended donor endow the high crystallinity, planarity, and intermolecular interaction. When developing high performance DPP-based polymers, two important issues were addressed to enhance the charge carrier transport in OTFTs; effect of alkyl side-chain and kind of donor moiety with the π-conjugation length. In this study, we have synthesized a series of DPP-based copolymers bearing more π-extended donanting units. Also, we systematically studied the effect of various donor units and donor length in these copolymers on the optical properties, film morphology, and carrier mobility in OTFT. |
