| 초록 |
Here we have demonstrated that inkjet-printing of bicomponent blends comprising liquid-crystalline semiconducting copolymer, Poly(didodecylquaterthiophene-alt-didodecylbithiazole) (PQTBTz-C12) and insulating commodity polymer, PS, provides efficient inkjet drop ejection process and a facile way to fabricate high performance organic transistors. By controlling the solubility-induced phase-segregation of the two components and thermal annealing condition, bilayer structure consisting of PS on the top and high crystalline PQTBTz-C12 layer on the bottom can be fabricated. Incorporating this blend film as active layer in polymer field-effect transistor, the semiconductor content can be reduced to several tens of picograms without any degradation in device performances. Furthermore, the inkjet-printed blend film exhibits a much greater environmental and electrical stabilities than those of homo PQTBTz-C12 film mainly due to the self-encapsulated structure. |
