Light-gated amorphous carbon memristors with indium-free transparent electrodes

B. J. Murdoch, T. J. Raeber, Z. C. Zhao, A. J. Barlow, D. R. McKenzie, D. G. McCulloch, J. G. Partridge

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Amorphous carbon-based memristors with transparent conductive electrodes can be programmed both optically and electronically. We demonstrate neuromorphic logic and memory functions using light-gated amorphous carbon (a-C) memristors with indium-free transparent electrodes. The devices consist of insulating tetrahedral a-C layers with Pt top contacts supported on conductive zinc tin oxide electrodes with intentionally-oxygenated a-C interfaces. Resistive switching occurs by electron trapping/de-trapping, allowing low power, self-rectifying operation. Broadband light pulses evoke paired-pulse facilitation, emulating photonic coincidence detection. Coincidence detection was also achieved using heterogeneous optoelectronic inputs demonstrating dendritic computation at the single memory cell level.

Original languageEnglish
Pages (from-to)59-65
Number of pages7
Publication statusPublished - Nov 2019
Externally publishedYes


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