[9p-C214-1~18] 12.4 Organic light-emitting devices, organic transistors, and flexible devices

2:15 PM - 2:30 PM JST(5:15 AM - 5:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation Award

[9p-C214-2] Development of reconfigurable artificial synapses based on an antiambipolar transistor

〇Nao Kobayashi^1,2, Yuho Yamamoto^1,3, Yoichi Yamada³, Kaname Kanai², Ryoma Hayakawa¹, Yutaka Wakayama¹ (1.NIMS, 2.Tokyo Univ. of Sci, 3.Tsukuba Univ.)

Keywords:

Anti-ambipolar transistor,Reconfigurable artificial synapses,Floating gate

In this study, we demonstrated reconfigurable synaptic operations utilizing a floating-gate-type anti-ambipolar transistor (FG-AAT), where excitatory and inhibitory synaptic operations were switched by applying unipolar gate voltage (VG) pulses. The AAT features a PN junction in its channel layer, exhibiting a Λ-shaped transfer curve. The drain current (ID) transits from an increase to a decrease with increasing VG. Next, the Λ-shaped transfer curve was largely shifted depending on the charges trapped in FG, enabling the transition from the increase to decrease in ID at the same VG. Consequently, we realized reconfigurable synaptic operations. The excitatory and inhibitory operations were electrically reconfigured by controlling the trapped charges in FG under the same unipolar gate voltage pulses. This behavior closely resembles that of biological synapses, highlighting the potential to attain more brain-like computing.