具有最大动态范围更新的二端自校正光电突触器件,Applied Materials Today

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具有最大动态范围更新的二端自校正光电突触器件
Applied Materials Today ( IF 7.2 ) Pub Date : 2023-01-03 , DOI: 10.1016/j.apmt.2022.101728
Wen Huang , Pengjie Hang , Xuwen Xia , Bin Li , Biao Li , Chenxia Kan , Huixing Zhang , Chen Zhu , Chenhao Wang , Xiaodong Zhu , Deren Yang , Xiaodong Pi , Xuegong Yu , Xing'ao Li

两端光电突触器件由于其结构简单，有利于神经形态计算系统中的器件集成而引起了越来越多的关注。然而，两端光电突触装置的突触权重更新和自校正性能较差。在这里，我们根据光学活性层MAPbI和电子传输层（ETL）SnO的混合结构在nip平面系统中制造两端光电突触器件，其中MAPbI和SnO分别用于产生和捕获载流子。兴奋性突触后电流 (EPSC)、配对脉冲促进 (PPF)、尖峰数量依赖性可塑性 (SNDP) 和尖峰速率依赖性可塑性 (SRDP) 等突触功能都可以在没有外部偏差的情况下成功模仿。这些突触装置具有自校正特性，最高比率为∼0.3×10，并且在已报道的两端光电突触装置中，其突触权重在14秒内表现出最大动态范围更新为14.3。此外，突触装置中EPSC的尖峰数可调性导致农用电机无人驾驶技术的直线行驶的实现。结果极大地促进了神经形态计算中两端光电突触装置的发展。

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Two-terminal self-rectifying optoelectronic synaptic devices with largest-dynamic-range updates

Two-terminal optoelectronic synaptic devices have attracted increasing attention owing to their simplicity of structures, which facilitate the device integration in neuromorphic computing systems. However, synaptic-weight updates and self-rectifying properties in two-terminal optoelectronic synaptic devices are inferior. Here, we fabricate two-terminal optoelectronic synaptic devices in accordance with the hybrid structure of optically active layers MAPbI and electron transport layers (ETLs) SnO in an n-i-p planar system, where MAPbI and SnO are used for generating and trapping carriers, respectively. Synaptic functionalities such as excitatory post-synaptic current (EPSC), paired-pulse facilitation (PPF), spike-number dependent plasticity (SNDP), and spike-rate dependent plasticity (SRDP) are all successfully mimicked without external bias. These synaptic devices possess self-rectifying properties with a highest ratio of ∼0.3 × 10 and their synaptic weight exhibits largest-dynamic-range updates of 14.3 within 14 seconds among the reported two-terminal optoelectronic synaptic devices. Furthermore, the spike-number tunability of EPSC in the synaptic devices leads to the realization of straight running of agrimotor driverless technology. Results dramatically promote the development of two-terminal optoelectronic synaptic devices in neuromorphic computing.

更新日期：2023-01-03

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