Organic electronic synapses (e-synapses) based on poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS)/graphene quantum dot (GQD) nanocomposites are fabricated by using a solution method. Current–voltage (I–V) curves for the devices under dual positive bias voltage sweeps show that the conductance with a pinched hysteresis gradually increased with increasing applied voltage, and those for the devices under dual negative bias voltage sweeps gradually decreased with increasing applied voltage, indicative of the fingerprint of e-synapses. The current in the devices decreases with increasing concentration of GQDs in the active layer, and the devices fabricated utilizing the ratio of PEDOT:PSS to GQDs of 1:0.4 shows the best performance among the e-synapses. The carrier transport and operating mechanisms of the e-synapses are described on the basis of both the I–V results and the trapping and escape of electrons from the GQDs.

利用溶液法制备了基于聚（3,4-乙撑二氧噻吩）聚苯乙烯磺酸盐（PEDOT：PSS）/石墨烯量子点（GQD）纳米复合材料的有机电子突触（e-突触）。电流-电压（I – V）曲线在双正偏置电压扫描下的器件显示，随着施加电压的增加，带有滞后磁滞的电导会逐渐增加，而在双负偏置电压扫描下的器件的电导会随着施加电压的增加而逐渐减小，这表明e的指纹-突触。器件中的电流随着有源层中GQD浓度的增加而降低，并且利用PEDOT：PSS与GQD的比例为1：0.4制成的器件在电子突触中表现出最佳性能。电子突触的载流子传输和运行机制是根据I – V结果以及电子从GQD的俘获和逸出来描述的。