Optically Controlled Ternary Logic Circuits Based on Organic Antiambipolar Transistors

Abstract

A ternary inverter is demonstrated based on an organic antiambipolar transistor (AAT), in which the output logic states can be precisely controlled with appropriate optical signals. First, the photoresponse of AATs consisting of PTCDI‐C8 and α‐6T layers is systematically investigated. Under visible light, the Λ‐shaped transfer curve of the AATs undergoes a noticeable broadening due to the optically induced threshold voltage shift in both the PTCDI‐C8 and α‐6T controlled ranges. Under ultraviolet light, broadening is observed only on the α‐6T side. These contrasting impacts of the two light signals enable to tune the balance of the ternary logic states in the inverters, including the output voltage levels and the ratio of the respective logic states. Such optically controlled ternary logic circuits possess great potential for their application in next‐generation optoelectronic devices.

Electrically Reconfigurable Organic Logic Gates: A Promising Perspective on a Dual‐Gate Antiambipolar Transistor

“…Due to this attractive feature, multivalued logic circuits (MVLs), such as ternary and quaternary inverters, have recently been realized, and their development is another significant strategy for improving the data processing capability of the currently used logic circuits. [39][40][41][42][43][44][45] In contrast to the abovementioned efforts on MVLs, our approach is to apply AATs to electrically reconfigurable logic circuits. A dual-gate configuration enables the control of the used Λ-shaped drain current by three input signals: bottom-gate, top-gate, and drain voltages.…”

“…Due to this attractive feature, multivalued logic circuits (MVLs), such as ternary and quaternary inverters, have recently been realized, and their development is another significant strategy for improving the data processing capability of the currently used logic circuits. [ 39–45 ]…”

Recent progress in organic field‐effect transistor‐based integrated circuits

“…Based on the AAT devices, Panigrahi et al observe that the logic state levels and their ratio can be controlled under light irradiation. 85 Since the capability of photoresponse are different for the two semiconductors, to be specific, the threshold voltage shift and the current enhancement of the p-type α-6 T are larger than that of the n-type PTCDI-C8, the change in antiambipolar transfer characteristics of the AAT under UV and visible light mainly occurs in the α-6 T controlled range. Taking advantage of the optically tunable antiambipolar characteristics, an optically controlled ternary inverter is fabricated.…”

Hybrid Thin-Film Materials Combinations for Complementary Integration Circuit Implementation

“…The integrated inverter produces the third state of "1/2" excluding "1" and "0" at the voltage transport curve, which is called a ternary inverter. Study of the ternary inverter is highly meaningful because of the high density of the data and simplification of the circuit system [112], and there were attempts to implement a hybrid ternary inverter. In 2020, Park et al reported a photo-triggered ternary inverter using a rubrene nanosheet (NS) TFT and a rubrene/MoS 2 n-p heterojunction antiambipolar transistor (AAT) (Figure 6a,b) [113].…”