Press Release 2022
Development of an Organic Transistor Enabling Higher Density Circuit Integration
—Construction of Multiple Logic Circuits Using Only a Single Transistor—
Tokyo University of Science
NIMS and the Tokyo University of Science have succeeded in developing an organic anti-ambipolar transistor capable of performing any one of the five logic gate operations (AND, OR, NAND, NOR or XOR) by adjusting the input voltages to its dual gates.
“Electrically Reconfigurable Organic Logic Gates: A Promising Perspective on a Dual-Gate Antiambipolar Transistor”
Ryoma Hayakawa, Kosuke Honma, Shu Nakaharai, Kaname Kanai, and Yutaka Wakayama;
Journal: Advanced Materials [February 10, 2022];
DOI : 10.1002/adma.202109491
Abstract
As the internet of things (IoT) becomes a reality, the amount of information that will need to be processed is expected to grow rapidly. This will require light, high-performance, mobile data processing devices. Organic integrated circuits with organic transistors are a potentially important technology in the development of such devices. However, the integration density of these circuits has remained very low because existing microfabrication technology is incompatible with them.
To address this issue, this research group developed an organic dual-gate anti-ambipolar transistor capable of performing two-input logic gate operations by designing it to reduce its drain current when the gate voltage exceeds a certain threshold.
When input voltages are applied to the top and bottom gates of the transistor, it produces an output signal (i.e., a drain current). This transistor demonstrated the ability to act as five different types of two-input logic gates at room temperature when the input voltages were adjusted. Existing integrated circuit technology requires four transistors to form a NAND circuit and 12 transistors to form a XOR circuit. By contrast, only one of these newly developed transistors is needed to form these circuits. In addition, this transistor may be used to substantially increase the integration density of organic circuits, which has been a major challenge in organic electronics. In future research, the group plans to develop electrically reconfigurable integrated circuits using this new transistor.
This project was carried out by Ryoma Hayakawa (Senior Researcher, Quantum Device Engineering Group (QDEG), International Center for Materials Nanoarchitectonics (MANA), NIMS), Shu Nakaharai (Principal Researcher, QDEG, MANA, NIMS), Yutaka Wakayama (Leader of QDEG, MANA, NIMS), Kosuke Honma (graduate student, Tokyo University of Science) and Kaname Kanai (Professor, Tokyo University of Science). This work was conducted under the NIMS–Tokyo University of Science Joint Graduate School framework in conjunction with another project entitled “Development of an organic negative resistance transistor in an effort to significantly increase the integration density of organic circuits” (principal investigator: Yutaka Wakayama, project number: 19H00866) funded by the JSPS Grant-in-Aid for Scientific Research (A).
This research was published online in Advanced Materials as an “accepted article” on February 10, 2022.
(Regarding this research)
Ryoma Hayakawa
Senior Researcher,
Quantum Device Engineering Group, MANA, NIMS
Tel: +81-29-860-4808
Fax: +81-29-860-4916
E-Mail: HAYAKAWA.Ryoma=nims.go.jp
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Yutaka Wakayama
Deputy Director, MANA, NIMS
Tel: +81-29-860-4403
Fax: +81-29-860-4916
E-Mail: WAKAYAMA.Yutaka=nims.go.jp
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Kaname Kanai
Professor, Department of Physics
Tokyo University of Science
Tel: +81-4-7122-1481
Fax: +81-4-7123-9361
E-Mail: kaname=rs.tus.ac.jp
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