Thin Film Transistors with Ink-Jet Printed Amorphous Oxide Semiconductors
- 1 May 2010
- journal article
- Published by IOP Publishing in Japanese Journal of Applied Physics
- Vol. 49 (5S1), 05EB06
- https://doi.org/10.1143/jjap.49.05eb06
Abstract
We investigated the influence of the thickness of printed Ga–In–Zn-O (GIZO) channel on transistor performance. Semiconductor layers were ink-jet printed using sol–gel derived GIZO solution and the thickness of the resulting active layers varied depending on the pre-heated substrate temperature. We found that GIZO film thickness significantly influences device performance. Thin film transistors (TFTs) with thicker active layers showed higher on-current/off-current mobility and a threshold voltage shift in the negative direction. The dependence of the electric characteristics on thickness resulted from the increased intrinsic free charge carriers as the active layer thickness increased. Ink-jet printing conditions need to be carefully controlled to maximize device performance.Keywords
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