In this paper, we report a general and low-cost process to fabricate high mobility metal–oxide semiconductors that is suitable for thin-film electronics. This process use simple metal halide precursors dissolved in an organic solvent and is capable of forming uniform and continuous thin films via inkjet-printing or spin-coating process. This process has been demonstrated to deposit a variety of semiconducting metal oxides include binary oxides (ZnO, In<sub>2</sub>O<sub>3</sub>, SnO<sub>2</sub>, Ga<sub>2</sub>O<sub>3</sub>), ternary oxides (ZIO, ITO, ZTO, IGO) and quaternary compounds (IZTO, IGZO). Functional thin film transistors with high field-effect mobility were fabricated successfully using channel layers deposited from this process. This synthetic pathway opens an avenue to form patterned metal oxide semiconductors through a simple and low-cost process and to fabricate high performance transparent thin film electronics via digital fabrication processes on large substrates.
© 2009 IEEE
Seung-Yeol Han, Doo-Hyoung Lee, Gregory S. Herman, and Chih-Hung Chang, "Inkjet-Printed High Mobility Transparent–Oxide Semiconductors," J. Display Technol. 5, 520-524 (2009)