Origin of the Negative Differential Resistance in the Output Characteristics of a Picene-Based Thin-Film Transistor

Abstract

In this work, we have fabricated and studied p-type picene thin-film transistors. Although the devices exhibited good electrical performance with high field-effect mobility (up to 1.3 cm2/V·s) and on/off ratios above 105, the output electric characteristics of the devices exhibited a Negative Differential Resistance for higher drain-source voltage. Finally, a possible explanation for this phenomenon is developed.

Keywords

• OTFT
• NDR
• organic semiconductors
• non-ideal output