Performance Improvement of Organic Thin-Film Transistors by Solution-Processed Crystallization of Pentacene at Room Temperature

Organic thin-film transistors (OTFTs) have been locally grown using solution-phase crystallization of pentacene at room temperature. For crystals grown on the surface, carrier mobility was measured to be approximately 3.0 cm²/V middot s with on/off ratios above 10⁶. V-shape trenches in the substrate helped to localize the crystallization to within the trenches, and these devices showed similar performance to the surface-grown crystals. This letter suggests that quality OTFT devices may be manufactured using low-cost scalable techniques at room temperature.