AM|一种用于电子突触应用的高温弹性单氯铜酞菁忆阻器

文章链接： https://doi.org/10.1002/ADMA.202006201

ClCuPc器件的忆阻特性与开关机制

摘要

忆阻器被认为是神经形态计算最有前途的设备概念之一，特别是由于其高度可调的电阻状态。为了实现神经形态计算体系结构，需要组装大型记忆交叉阵列，这往往伴随着严重的热损耗。而在神经形态应用的背景下，有机材料可以根据需要定制电子特性。然而，这些材料更容易受热，热致降解等有害影响直接导致设备运行失效。在这里，一个由一氯铜酞菁形成的有机记忆突触被证明在室温高达300°C的环境空气中仍可工作并能够在没有任何封装的情况下进行记忆开关。电导的变化被发现是离子运动的结果，与生物神经元发生的情况非常相似。此外，通过反复机械弯曲后具有稳定开关行为的柔性记忆电阻器，以及能够模拟可训练和可重构记忆电阻器阵列用于图像信息处理的有机突触，这一方法的高可行性得到了展示。该结果为有机神经形态器件的实用性开创了先例。

Memristors are considered to be one of the most promising device concepts for neuromorphic computing, in particular thanks to their highly tunable resistive states. To realize neuromorphic computing architectures, the assembly of large memristive crossbar arrays is necessary, but is often accompanied by severe heat dispassion. Organic materials can be tailored with on-demand electronic properties in the context of neuromorphic applications. However, such materials are more susceptible to heat, and detrimental effects such as thermally induced degradation directly lead to failure of device operation. Here, an organic memristive synapse formed of monochloro copper phthalocyanine, which remains operational and capable of memristive switching at temperatures as high as 300 °C in ambient air without any encapsulation, is demonstrated. The change in the electrical conductance is found to be a result of ion movement, closely resembling what takes place in biological neurons. Furthermore, the high viability of this approach is showcased by demonstrating flexible memristors with stable switching behaviors after repeated mechanical bending as well as organic synapses capable of emulating a trainable and reconfigurable memristor array for image information processing. The results set a precedent for thermally resilient organic synapses to impact organic neuromorphic devices in progressing their practicality.