A π-conjugated Lewis acid dopant, branched octyloxy borane (BOB), was designed to modulate the solid-state microstructure of DPP-based polymers. BOB suppresses long-range crystallinity and promotes short-range aggregation via non-covalent interactions. At 1 wt%, it improves the crack onset strain from 20 to 100%, while retaining high carrier mobility over 1.0 cm2 V–1 s–1. This strategy enables simultaneous enhancement of mechanical and electronic performance through dopant-induced morphology tuning.
- Tzu-Ming Hung
- Chung-Chieh Kang
- Chien-Chung Shih
