| 초록 |
Based on Hansen solubility parameter analysis, this study employed a non-halogenated binary solvent blend of mesitylene and acetophenone to closely mimic the efficiency of dichlorobenzene, a well-known chlorinated solvent for widely used conjugated polymers used in organic field-effect transistors (OFETs) such as (P(NDI2OD-T2)), (DPPT-TT) and (IDT-BT). We tuned the solvent quality of the non-halogenated binary blend in various ratios and studied their effect on polymer pre-aggregation in the solution state, polymer microstructure, and morphological evolution of polymer thin films cast from the solvent blends. High-performance top-gate/bottom-contact OFETs were demonstrated with field-effect mobility values of up to ~0.574, ~0.634 and ~0.785 cm2/V/s for P(NDI2OD-T2), DPPT-TT, and IDT-BT polymers, respectively, employing a mesitylene and acetophenone blend (95:5 vol%) as a processing solvent. |
