A switching effect was investigated in poly p-phenylenevinylene PPV . N-shaped current-voltage I-V characteristics of thick ITO-PPV-Al structures were observed, which correspond to switching at a threshold voltage typically in the range 2-5 V from a conducting to a resistive state. The behaviour was independent of the polarity of the applied voltage and the sweep direction. At the threshold voltage, the current changes by approximately one and a half orders of magnitude of its previous value. Pulsed measurements show that the transition time from one to the other conductive state is less than 1 s. The switching effect can be associated with strongly localized current pathways.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.