With the rapid development of wearable artificial intelligence devices, there is an increasing demand for flexible oxide neuromorphic transistors with the solid electrolytes. To achieve high-performance flexible synaptic transistors, the solid electrolytes should exhibit good mechanical bending characteristics and high ion conductivity. However, the polymer-based electrolytes with good mechanical bending characteristics show poor ion conductivity (10-6-10-7 S/cm), which limits the performance of flexible synaptic transistors. Thus, it is urgent to improve the ion conductivity of the polymer-based electrolytes. In the work, a new strategy of electrospun Li0.33La0.557TiO3 nanofibers-enhanced ion transport pathway is proposed to simultaneously improve the mechanical bending and ion conductivity of PEO/PVP-based solid electrolytes. The flexible InZnO synaptic transistors with Li0.33La0.557TiO3 nanofibers-based solid electrolytes successfully simulated excitatory postsynaptic current, paired-pulse-facilitation, dynamic time filter, nonlinear summation, two-terminal input dynamic integration and logic function. This work is a useful attempt to develop high-performance synaptic transistors.
Fu Wenhui, Li Jun, Li Linkang, Jiang Dongliang, Zhu Wenqing, Zhang Jianhua
Electrospinning, Flexible synaptic transistor, LLTO nanofiber