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Monday Oct 03, 2022

A new organic transistor allows for higher-performance circuit integration in high-performance mobile devices

Multiple logic circuits can be constructed using a single transistor.

The Tokyo University of Science and the National Institute for Materials Science (NIMS), have developed an organic anti-ambipolar transistor that can perform any of five logic gate operations (AND OR, NAND OR, NOR or XOR). This is possible by adjusting the input voltages of its dual gates. This lightweight transistor with multiple logic gate capability may be used to develop electrically reconfigurable logic circuits–potentially key to the development of high-performance mobile devices.

The internet of things (IoT), which is now a reality, will lead to an increase in the amount of data that must be processed. These devices will need to be lightweight and mobile, with high-performance data processing capabilities. The development of organic integrated circuits with transistors is a game-changing technology. The integration density of these circuits is still very low because they are incompatible with existing microfabrication technology. This research group created an organic dual-gate anti ambipolar transistor that can perform two-input logic gates operations. It reduces its drain current when the gate voltage exceeds certain thresholds. The transistor produces an output signal when input voltages are applied at the top and bottom gate of the transistor. This is known as a drain current. The transistor was able to function as five types of two-input logic gate at room temperature, depending on the input voltages. To form a NAND and XOR circuits in existing integrated circuit technology, four transistors are required. These circuits can be made with only one of the newly developed transistors. This transistor could also be used to significantly increase the integration density in organic circuits. This is a significant challenge in organic electronics. The group will continue to research the new transistor and develop electrically reconfigurable integrated systems.

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