[3PS-006]
Side Chains as a Key Factor Governing Dopant Diffusion in Solution-Sequentially Doped Conjugated Polymer Films
발표자배주영 (가천대학교)
연구책임자이한솔 (가천대학교)
Abstract
We investigated the role of polymer side chains in dopant diffusion during solution sequential doping of conjugated polymer thin films, with a focus on side-chain-free systems. A polythiophene derivative with thermocleavable side chains, P3ET, was used, and solution sequential doping with F4TCNQ was performed on both side-chain-containing films and side-chain-free films obtained by thermocleavage. Although a comparable amount of F4TCNQ was incorporated in both cases, its spatial distribution differed significantly depending on the presence of side chains. In side-chain-free films, F4TCNQ showed pronounced localization near the film surface, indicating severely restricted dopant diffusion. This behavior is attributed to reduced side-chain–solvent interactions and suppressed polymer film swelling in the absence of side chains.