A unipolar-driven synaptic transistor for environment-adaptable vision system

Sukwon Jang, Keunho Soh, Chungryeol Lee, Taehyun Nam, Minjae Jang, Jeong-ik Park, Changhyeon Lee, Junhwan Choi, Jung Ho Yoon () and Sung Gap Im ()
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Sukwon Jang: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Keunho Soh: Jangan-gu
Chungryeol Lee: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Taehyun Nam: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Minjae Jang: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Jeong-ik Park: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Changhyeon Lee: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)
Junhwan Choi: Suji-gu
Jung Ho Yoon: Jangan-gu
Sung Gap Im: Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology (KAIST)

Nature Communications, 2025, vol. 16, issue 1, 1-12

Abstract: Abstract Unlike conventional synapses in neural networks relying on bipolar spike-driven modulation, biological synapses in the peripheral nervous system handle unipolar input based on stimulus intensity, generating excitatory or inhibitory signals. Here, we demonstrate a unipolar-driven synaptic transistor (UDST) that exhibits both responses under a single-polarity voltage. The unipolar property is achieved within a single device through a bilayer gate dielectric, comprising a high-k charge trapping layer (k > 6) and an ultrathin charge tunneling layer (

Date: 2025
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DOI: 10.1038/s41467-025-63073-2

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