Reconfigurable Organic Logic Circuits Based on a Dual-Gate Antiambipolar Transistor

Reconfigurable organic logic circuits are promising candidates to realize new computation architectures which are not obtained in the current CMOS-based architectures. This is because these devices enable the flexible and diverse circuit designs by the electrical rearrangements of individual electronic components. This feature is expected to attain high-speed data processing, low power operation and the large-scale integration of the organic logic circuits, which are the desirable requirements in the forthcoming Internet of Things society.<br/><br/>In this presentation, we introduce electrically reconfigurable organic logic circuits based on a dual-gate antiambipolar transistor (DG-OAAT). The transistor exhibits a sharp increase and then decrease in the drain current despite the increase in the gate voltage [1,2]. Namely, a peak drain current, which originates from negative differential transconductance, is visible even at room temperature [3,4]. Of importance is that the peak drain current in the transistor is precisely controlled by three input voltages: bottom-gate, top-gate, and drain voltages. Based on these features, we achieved multiple logic gate operations, which coincide with AND, OR, NAND, NOR, and XOR, by just adjusting the bottom-gate and top-gate voltages in a DG-OAAT. Furthermore, the control of the drain voltage induced reversible switching of two logic gates, for instance, NAND/NOR and OR/XOR. Our device concept is therefore promising for realizing multifunctional logic circuits with a simple transistor configuration, which would lead to large-scale integration of organic logic circuits.<br/><br/>[1] K. Kobashi, R. Hayakawa, T, Chikyow, and Yutaka Wakayama, <i>Adv. Electron. Mater.</i> 3, 1700106 (2017).<br/>[2] K. Kobashi, R. Hayakawa, T, Chikyow, and Yutaka Wakayama, <i>ACS Appl. Matter. Interfaces </i>10, 2762 (2018).<br/>[3] K. Kobashi, R. Hayakawa, T, Chikyow, and Yutaka Wakayama, <i>J. Phys. Chem. C </i>122, 6943 (2018).<br/>[4] K. Kobashi, R. Hayakawa, T, Chikyow, and Yutaka Wakayama, <i>Nano. Lett. </i>18, 4355 (2018).