Low-Cost $\hbox {MoO}_{3}/\hbox {Al}$ Bilayer Electrode for Pentacene-Based OTFTs

MoO₃ prepared by oxidizing a Mo filament (oxidized MoO₃) with Al is a good replacement of a Au electrode for pentacene-based organic thin-film transistors (TFTs) (OTFTs). The oxidized MoO₃/Al bilayer electrode shows better result than the laboratory-prepared pure MoO₃/Al bilayer electrode. This process will save the cost of laboratory-prepared pure MoO₃. The OTFTs show a very good current on-off ratio of 1.6 × 10⁶ and a field-effect mobility (μ) of 0.57 cm²/V·s. With this process, we can fabricate low-cost pentacene TFTs with better performance by using a very simple fabrication technique.