A key issue in research into organic thin-film transistors (OTFTs) is low-voltage operation. In this study, we fabricated a pentacene thin-film transistor with an ultrathin layer of polyvinyl alcohol (9 nm) as a gate insulator, and obtained a device with excellent electrical characteristics at low operating voltages (below 2 V). This device was found to have a field-effect mobility of 1.1 cm2 V s, a threshold voltage of -0.98 V, an exceptionally low subthreshold slope of 180 mV /decade, and an on/off current ratio of 106. This favorable combination of properties means that such OTFTs can be operated successfully at voltages below 2 V.
Bibliographical noteFunding Information:
This work was supported by the National Research Laboratory Program and ERC Program (R11-2003-006-03005-0) of the MOST, a grant (No. F0004022) from the Information Display R&D Center under the 21st Century Frontier R&D Program, and a grant (No. RT104-01-04) from the Regional Technology Innovation Program of the MOCIE, and the BK21 Program of the Ministry of Education and Human Resources Development of Korea.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)