基于铁电材料P(VDF-TrFE)调控的多级光突触晶体管

Multistage Photosynaptic Transistor Based on the Regulation of Ferroelectric P(VDF-TrFE)

利用有机材料PDVT-10中固有的持续光电导效应,结合铁电材料P(VDF-TrFE)提供的极化电场,通过调整铁电材料的极化强度来实现对光突触器件驰豫特性的调控。模拟了突触的短期可塑性、双脉冲易化性等基本功能,并进一步实现了多级、可调光突触。此外,持续光电导效应的驰豫现象与生物突触中Ca^(2+)的流动特性相类似,可以更好地模拟生物突触行为。研究结果为开发可调光突触提供了一个新的思路。

The persistent photoconductivity of organic material PDVT-10 combined with the polarization field provided by ferroelectric material P(VDF-TrFE),was used to control the relaxation characteristics of the photosynaptic device by adjusting the polarization intensity of ferroelectric material.The basic functions such as short-term plasticity and paired pulse facilitation of synapses are simulated,and the multilevel dimmable optical synapses are further realized.Moreover,the relaxation phenomenon of continuous photoconductance effect is similar to the flow characteristics of Ca^(2+) in biological synapses,which can better simulate the synaptic behavior of biological synapses.This study provides a new idea for the development of adjustable photosynapses.