Resistive Switching in Electrodeposited Prussian Blue Layers

Abstract

Prussian blue (PB) layers were electrodeposited for the fabrication of Au/PB/Ag stacks to study the resistive switching effect. The PB layers were characterized by different techniques to prove the homogeneity, composition, and structure. Electrical measurements confirmed the bipolar switching behavior with at least 3 orders of magnitude in current and the effect persisting for the 200 cycles tested. The low resistance state follows the ohmic conduction with an activation energy of 0.2 eV.

Nanostructured metal‐doped Prussian blue thin film electrodes for efficient and stable electrochromic supercapacitors

“…XPS spectrum of the Mo‐PB film is presented in Figure 2E‐H, while that of the other samples is provided in the Supporting Information (Figure S6). In Figure 2E, the presence of Fe 2p, O 1 s, N 1 s, K 2p, and C 1 s signals indicates the formation of PB 42 . As expected, the N 1 s and C 1 s signals have a very similar peak intensity originating from the CN − ligands; together with K 2p, this is evidence for the presence of KFe 3+ [Fe 2+ (CN) 6 ] 3 in the film.…”

“…In Figure 2E, the presence of Fe 2p, O 1 s, N 1 s, K 2p, and C 1 s signals indicates the formation of PB. 42 As expected, the N 1 s and C 1 s signals have a very similar peak intensity originating from the CN À ligands; together with K 2p, this is evidence for the presence of KFe 3+ [Fe 2+ (CN) 6 ] 3 in the film. Figure 2F shows the deconvoluted Fe 2p peak and the fitted curves.…”

“…Figure 5B,C shows the deconvoluted Fe 2p and O 1s spectra of Mo‐PB in the coloured and bleached states. The Fe 2p spectra exhibited Fe 2+ oxidation (708.2 and 720.9 eV) and Fe 3+ oxidation (710.7 and 723.7 eV) states, which were identical to the as‐prepared Mo‐PB 42 . After being fully bleached, Fe 2p 3/2 shifted to a low energy, is because of the change in the coordination surroundings of iron with the insertion of Li 2+ ions.…”

“…The coexistence of Fe 2+ (708.0 and 720.79 eV) and Fe 3+ (709.6 and 722.4 eV). The peak energy differences of 12.8 eV is indicative of the formation of PB 42 . On the other hand, the peaks at 231.24 and 234.47 eV (Figure 2G) are of Mo 3d 5/2 and Mo 3d 3/2 , respectively, signifying the successful doping of PB with Mo with a Mo 5+ 43 .…”

“…The peak energy differences of 12.8 eV is indicative of the formation of PB. 42 On the other hand, the peaks at 231.24 and 234.47 eV (Figure 2G) are of Mo 3d 5/2 and Mo 3d 3/2 , respectively, signifying the successful doping of PB with Mo with a Mo 5+ . 43 The O 1s (Figure 2H) is due to the surface oxides.…”