Self-Assembly Behavior of Doped Semiconducting Polymers in Solution and Solid States
발표자
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초록
내용
Poly(3-hexylthiophene) (P3HT), which is a well-known semiconducting polymer, can form various self-assembled structures in both solution and solid states. The conjugated structures are significantly dependent on processing recipes controlled to enhance the optoelectrical performance of P3HT based devices. However, P3HT still has low charge-carrier mobilities hard to be operated with low operating voltages. Here, we investigate doping effects on the self-assembly and conductivity of P3HT blends containing dopant molecules. Interestingly, small amounts of dopants act as nucleation sites, which can induce highly-interconnected nanofibrils of P3HT in solution-cast films, without any treatment. A doped P3HT film can the highest charge-carrier mobility values of 0.18 cm2/Vs in organic thin-film transistor, in comparison to 0.02 cm2/Vs of the best P3HT only system.