Fabrication and Characterization of Cobalt–Iron Prussian Blue Analog Films for Resistive Switching Devices

The physical and chemical properties of Prussian blue analogs (PBAs) have increasingly attracted the attention of the scientific community due to its promising applications in electrochemical sensing, electrochromic devices, batteries, supercapacitors, and magnetic/ photomagnetic systems, among others. Recently, we have studied the resistive switching effect in electrodeposited Prussian blue (PB) [1], Prussian white (PW) [2], and Na-based Prussian blue films [3] enabling potential applications in the field of memristors. However, the potential of other PBAs for resistive switching in combination with the control of film morphology, stoichiometry, chemical composition, and crystalline structure are rarely investigated.

In this work, the relationship between the structural properties and resistive switching behavior of electrodeposited cobalt–iron PBA films is highlighted. The morphological and structural characterizations are performed with electron microscopy in combination with Raman spectroscopy and different X-ray techniques. Moreover, resistive switching behavior is detected in the PBA films. The electrical switching characteristics are carefully analyzed and discussed.

[1] L. B. Avila et al., Materials 12 (2020) 5618.

[2] F. L. Faita et al., J. Alloys Compd. 896 (2021) 162971.

[3] M. Pohlitz et al., Materials 15 (2022) 7491.