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

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 (<5 nm), which synergistically facilitate dipole polarization and charge trapping. The UDST exhibits potentiation, depression, and adaptation while maintaining exceptional durability, with a dynamic range reduction of less than 0.9% over 2000 potent

SUBMITTER: Jang S 

PROVIDER: S-EPMC12357933 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature