Empa-Swiss Federal Laboratories for Materials Science and Technology, Ueberlandstrasse 129, 8600, Dübendorf, Switzerland.
Ecole Polytechnique Fédérale de Lausanne (EPFL), Soft Transducers Laboratory LMTS, Neuchâtel, Switzerland.
Sci Rep. 2020 Oct 7;10(1):16664. doi: 10.1038/s41598-020-73705-w.
The rapid evolution of the neuromorphic computing stimulates the search for novel brain-inspired electronic devices. Synaptic transistors are three-terminal devices that can mimic the chemical synapses while consuming low power, whereby an insulating dielectric layer physically separates output and input signals from each other. Appropriate choice of the dielectric is crucial in achieving a wide range of operation frequencies in these devices. Here we report synaptic transistors with printed aluminum oxide dielectrics, improving the operation frequency of solution-processed synaptic transistors by almost two orders of magnitude to 50 kHz. Fabricated devices, yielding synaptic response for all audio frequencies (20 Hz to 20 kHz), are employed in an acoustic response system to show the potential for future research in neuro-acoustic signal processing with printed oxide electronics.
神经形态计算的快速发展激发了人们对新型脑启发电子设备的探索。突触晶体管是一种三端器件，它可以在低功耗的情况下模拟化学突触，其中绝缘介电层将输出和输入信号物理上彼此分离。在这些器件中实现宽的工作频率范围，合适的介电材料的选择是至关重要的。在这里，我们报告了具有印刷氧化铝介电层的突触晶体管，将溶液处理突触晶体管的工作频率提高了近两个数量级，达到 50kHz。所制造的器件对所有音频频率（20Hz 至 20kHz）都有突触响应，被用于声学响应系统中，展示了在神经声信号处理方面使用印刷氧化物电子学进行未来研究的潜力。
