ORGS4-0120
Carbonyl-Driven Dual-Mode Electrostatic Doping of High-Conductivity Polymers for Advanced Electronic and Optoelectronic Electrodes
Topic
GS4. Graduate Student Oral Session IV: Polymers for Electronics, Photonics, and Energy
When and Where
Sep 28, 2026
14:12 - 14:24
Room 104
Session Chairs
Hobeom KIM
Giwon LEE
Hyeong Jun KIM
Presenter(s)
Seungju Kang (SKKU Advanced Institute of Nanotechnology (Sungkyunkwan University))
Co-Author(s)
Abstract
Alkylsilane-assisted self-assembled monolayer (SAM) doping offers a robust platform for engineering high-performance organic electrodes, overcoming the chronic dopant diffusion and instability issues of conventional doping strategies. However, the exact underlying chemical reaction sites and doping mechanisms have remained elusive, impeding systematic material optimization for advanced device applications. This study reports the comprehensive elucidation of these hidden mechanisms utilizing an ultrahigh-conductivity n-type conjugated polymer, poly(benzodifurandione) (PBFDO). Through rigorous multi-scale characterization, it is demonstrated that hydrolyzed alkylsilanes undergo a carbonyl-directed nucleophilic addition pathway rather than traditional hydroxyl-mediated condensation. Furthermore, this work validates a dual-mode electrostatic doping model driven by the aligned silane dipole moments, which induces powerful electronic perturbations and bulk doping propagation via the proximity effect. Notably, by introducing aminoalkylsilanes, near-theoretical-limit doping of pristine PBFDO is successfully achieved, reaching an unprecedented doping efficiency of up to 1.79 electrons per repeating unit and a dramatic enhancement in chemical, thermal, and mechanical durability
