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(Color online) Initial I-V characteristic of the Ag/ZnO/Pt capacitor; the inset shows the schematic view of the structure.
(Color online) Bipolar resistance switching characteristics of the Ag/ZnO/Pt device; the inset shows the log–log plot of current–voltage (I–V) in the negative-voltage region.
PL spectra of the Ag/ZnO/Pt columns switched to different resistive states.
(Color online) Current–voltage plot of the Ag/ZnO/Al structure showing monopolar resistance switching.
(Color online) Photoluminescence of the Ag/ZnO/Pt columns switched by monopolar (1, 2) and bipolar (3) voltage polarity; the inset shows the ultraviolet part of spectrum.
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