Lateral Artificial Synapses on Hybrid Perovskite Platelets with Modulated Neuroplasticity. (9th September 2020)

• Record Type: Journal Article
• Authors: Gong, Jiangdong; Yu, Haiyang; Zhou, Xin; Wei, Huanhuan; Ma, Mingxue; Han, Hong; Zhang, Shuo; Ni, Yao; Li, Yuelong; Xu, Wentao
• Is Part Of: Advanced functional materials. Volume 30:Number 46(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-09
• Subjects: activity‐dependent plasticity -- artificial synapses -- neuromorphic devices -- perovskite single crystals; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adfm.202005413
• Languages: English
• ISSNs: 1616-301X

Abstract

Abstract: Polycrystalline organometal halide perovskite films have been recently exploited as the active layer in artificial synapses, demonstrating the basic functional emulation of biological synapses. However, for the implementation of neuromorphic computing and bioinspired intelligent systems, full synapse‐like functionality with a simple structure and extremely low energy consumption are of crucial importance. Here, a modified thickness‐confined surfactant‐assistant self‐assembly strategy is proposed to synthesize CH3 NH3 PbBr3 single‐crystalline thin platelets (SCTPs) and a two‐terminal lateral‐structured synaptic device with ultralow operating current down to sub‐pA is fabricated. Essential synaptic behaviors are realized, including paired‐pulse facilitation, spike‐dependent plasticity, transition from sensory memory to short‐term memory and potentiation/depression. Furthermore, the activity‐dependent plasticity is also demonstrated on the SCTP‐based artificial synapse, which may enable nociceptors to detect intense external harm. These results provide a new protocol for designing lateral‐structured synaptic devices based on hybrid perovskite SCTPs and future neuromorphic bioelectronics. Abstract : A two‐terminal lateral‐structured artificial synapse is designed and fabricated with CH3 NH3 PbBr3 single‐crystalline thin platelets (SCTPs). This SCTP‐based artificial synapse can realize a series of synaptic functions, including paired‐pulse facilitation, spike‐dependent plasticity and potentiation/depression. Compared to the polycrystalline thin film‐based artificial synapses, the SCTP‐based artificial synapses can operate with a lower operating current and energy consumption.