The Investigation Of EDL Synaptic Transistors Gated By Original Materials

Recently,the EDL synaptic transistors have attracted wide attention due to its advantages of EDL capacitance.It is an effective way for improving the electrical properties of the EDL synaptic transistors to choose the appropriate gate dielectric material.In this paper,several original gate dielectric materials,including KH550-GO,PSG and methyl cellulose solid electrolyte are used to design and prepare the EDL synaptic transistors,which electrical properties are analyzed in detail.The applications of the EDL synaptic transistors as an artificial synaptic device in the biomimetic field of synaptic plasticities are further expanded,which helps to simplify the design of the neural form circuit and reduce the power consumption of the system.Moreover,it will provide selective microelectronic component and theoretical support for the realization of artificial intelligence and artificial brain.The main contents of this paper are as follows:Firstly,the KH550-GO solid electrolyte film is prepared by the ammoniacal reaction between the carboxyl group in GO and the amino group in the KH550.The EDL synaptic transistors gated by KH550-GO solid electrolyte are fabricated.It is found that the KH550-GO solid electrolyte has excellent control effect.Furthermore,a resistor-loaded inverter based on this transistor is further developed,the voltage gain increases from 6.2 to 24 with V_DDD increasing.The results show that this transistor can regulate the voltage gain so as to achieve the requirement of driving the next level components of the logic circuit.Based on the effect of capacitance coupling in KH550-GO solid electrolyte,the AND logic operation function is realized in laterally coupled dual-gate EDL synaptic transistors.Finally,the biomimetic behaviors of the biological synaptic plasticity are successfully realized in the device,including EPSC?PPF?Filter?Adaption?the transformation of STP to LTP.Secondly,the PSG thin films can be prepared as gate dielectric to fabricate the EDL synaptic transistors.It is found that this transistors exhibit good electrical properties.The operation voltage,I_on/offn/off and?of this device are1.2 V,1.2×10⁷ and 3.2 cm²/V·s,respectively.In addition,the EDL synaptic transistors can simulate biological synaptic plasticities.The activity and humidity dependent synaptic plasticities are demonstrated.Finally,the EDL synaptic transistors gated by methyl cellulose are prepared on the ITO conductive glass substrate.The results show that the capacitance of methyl cellulose is 1.7?F/cm² at the frequency of 1 Hz.The methyl cellulose has porous microstructure,which acts as the passage of proton movement,and the proton conductivity is as high as 1×10^-33 S/cm.The operation voltage,I_on/off,SS and?of this device are 1.0 V,1×10⁶,84.5 mv/dec.,and 38.4cm²/V·s,respectively.The resistive-load inverter based on these synaptic transistor is designed.The results shows that the operation voltage of the inverter can be regulated by the V_DD.The EPSC behaviors in biological synapses are simulated in these synaptic transistor,which can be simulated by changing the waveform,size,spike width and amplitude of the input voltage.