Alcohol as a Processing Solvent of Polymeric Semiconductors to Fabricate Environmentally Benign and High Performance Polymer Field Effect Transistors. (2nd July 2015) - Cheon, Kwang Hee
Abstract : Here, a novel strategy is reported to develop polymer field effect transistors using ethanol, propanol, and butanol—the most environmentally benign solvent except water—as processing solvents. From such environmentally benign processes, for the first time high‐mobility (>1 cm 2 V −1 s −1 ) polymer field effect transistors are demonstrated. These mobility values realized from "really green solvents" exceed those of conventional hydrogenated amorphous silicon semiconductors. To achieve this 1) stable sub‐microparticles of conjugated polymers dispersed in alcohols are fabricated, 2) an aldehyde‐assisted surface tension‐depression methodology is developed to successfully form thin films from alcohol, and 3) the structural information of alcohol‐dispersed sub‐microparticles of semiconducting polymers is carefully characterized. Abstract : Colloidal solutions of conjugated semiconducting polymer are fabricated using a simple dispersion method of conjugated random copolymer in low‐molecular‐weight alcohols, including ethanol, propanol, and butanol. From such environmentally benign processes, for the first time, high‐mobility (>1 cm 2 V −1 s −1 ) polymer field effect transistors are demonstrated.