Solvent-Assisted Post-Treatment of π-Conjugated Polymer Thin Films: Impact on Morphology and Charge Transport.
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초록
내용
We investigate a solvent-assisted post-treatment of conjugated polymer thin films and demonstrate that the selection of appropriate solvents for the post-treatment is critical to improve the device performance of polymer OFETs. The influence of solvent-assisted post-treatment on the molecular ordering, morphologies, and electrical properties of P3HT thin films was systematically evaluated by controlling the solubility and boiling point of the solvents. Further, polymer OFETs with a top-gate, bottom-contact geometry were successfully constructed through an optimized processing condition, and exhibited an improvement in electrical properties. In particular, the OFETs prepared via a solvent treatment with a CHCl3/hexane (83/17 v/v) mixture exhibited 5-fold higher mobility, with the highest mobility of 0.10 cm2 V-1 s-1, compared to the pristine OFETs.