| 초록 |
Structural control of π-conjugated polymers in the solid state is a challenging task to improve the charge-carrier transport along the π-conjugated solid thin films. The intrinsic amorphous character prevents the polymers from organizing into a controlled structure by conventional solution film procedures such as spin- and drop-casting. Here, we introduced how to optimize π-conjugated structures of regioregular poly(3-hexyl thiophene)-based polymers with well-defined molecular weights (3.1 kDa~31 kDa, determined by MALDI MS) and molecular weight distribution (＜ 1.3). Based on the structural analyses of cast P3HT films, P3HT organic field-effect transistors were optimized and successfully demonstrated with high electrical performances: field-effect mobility (~0.05 cm2/Vs); on/off current ratio (＞105); threshold voltage (±1V). |
