| 초록 |
Understanding the structure-property relationship in conjugated polymers is of fundamental importance in designing materials with desired properties. Especially the kinds of alkyl-chain and its length as well as substituting position of the alkyl chain on the conjugated polymers have crucial consquences on molecular packing and thin film morphology, and hence on device performance. Herein we describe the preparation of new diketopyrrolopyrrole (DPP)-based conjugated polymers consisting with different alkyl chains in the DPP unit and its use in the solution-based fabrication of organic thin film transistors (OTFTs). We have observed highest hole mobility, 0.15 cm2/Vs for PTDPPA-J6, 0.05 cm2/Vs for PTDPPA-J8, and 0.34 cm2/Vs for PTDPPA-J12. The structure-property relationship by structural characterization has been studied. |
