| 초록 |
Doping has been a key topic in organic electronics since the demonstration of a metallic conductivity in doped p-conjugated polymers. However, it has been difficult to prevent dopant-induced structural and energetic disorder, while maintaining a high conductivity. We have developed an efficient doping method based on solid-state diffusion of F4-TCNQ which introduced a minimal structural disorder in various conjugated polymers including PBTTT, which allowed the observation of 2D coherent transport. Furthermore, we have recently employed this doping method to enhance charge injection in organic field-effect transistors (FETs). A selective contact doping of PBTTT FETs by solid-state diffusion of F4-TCNQ achieved a significantly lower contact resistance. Our developed dopant blockade method was shown to be effective for resolving diffusion problem, which is essential for designing stable and low-power organic electronic devices by utilizing doping of conjugated polymers. |
