[2PS-132]
Spontaneous Defect Removal and Structural Ordering in Uniaxially Aligned Poly(3-hexylthiophene) by Molecular p-Doping
발표자고은서 (한양대학교)
연구책임자강영종 (한양대학교)
Abstract
Charge-transfer doping is widely used to enhance the electrical conductivity of semiconducting polymers, yet its structural impact remains unclear. Here, we report spontaneous defect removal induced by molecular p-doping in uniaxially aligned poly(3-hexylthiophene) (P3HT) films prepared via eutectic friction transfer. Upon F4TCNQ doping, torsional defects and transient amorphous domains in the aligned P3HT are converted into charged, well-ordered crystalline phases, as confirmed by polarized spectroscopy and GIWAXS. In contrast, spin-cast P3HT films retain settled amorphous phases and show minimal structural reorganization. Consequently, the doped aligned P3HT films exhibit electrical conductivities several orders of magnitude higher than spin-cast counterparts. These results demonstrate that molecular p-doping can act as a defect-healing mechanism when combined with uniaxial chain alignment.