POS5-0808
Achieving Conduction charge transport Pathways to Improve impurity scattering in Doped Conjugated Polymers
When and Where
Nov 30, -0001
00:00 - 00:00
Presenter(s)
byeongjin kim (POSTECH RIST 3- dong)
Co-Author(s)
Abstract
Chemical doping is an effective strategy for improving the electrical properties of conjugated polymers (CPs). However, structural disorder in doped CPs often limits long-range charge transport by disrupting the connectivity between conductive domains, resulting in subpercolative transport behavior. In this study, we introduce a molecular design approach that promotes the formation of small π–π aggregates within amorphous regions to enhance charge-transport pathways. By incorporating 33 mol% unsubstituted thiophene units into a random copolymer, RP33 exhibits high electrical conductivity exceeding 500 S cm-1 after ion-exchange doping. Structural and transport characterizations indicate that the locally formed π–π aggregates bridge disordered regions and create effective percolation networks, thereby facilitating more coherent charge transport. These results demonstrate that controlling aggregate formation in amorphous domains is a viable microstructural design strategy for improving charge transport in doped CPs.
