| 초록 |
We report three types of dicyanodistyrylbenzene-based copolymers, which present highly balanced ambipolar charge transport characteristics in OFETs. The introduction of the DCS moiety in a polymer backbone not only lowers the LUMO level, but also increases the crystalline ordering via interchain dipole-dipole interactions. The determined hole/electron mobilities of the OFETs were 0.064/0.014, 0.492/0.181, and 0.420/0.447 cm2/Vs for PBDT-DCS, PT-DCS, and PNDI-DCS, respectively, after thermal annealing at 250 °C. Therefore, PNDI-DCS provided completely symmetric output curves in the positive and negative drain voltage regions with almost equivalent hole and electron mobilities. Benefitting from the balanced ambipolar feature of the PNDI-DCS OFETs, a complementary inverter was successfully fabricated. |
