Nonvolatile Memory Device Based on Bipolar and Unipolar Resistive Switching in Bio‐Organic Aloe Polysaccharides Thin Film

Growing environmental awareness has prompted a paradigm shift toward using green materials for various electronic applications. Bio‐organic materials are promising candidates attributable to their inherent biocompatibility, biodegradability, and environmental friendliness. Here, a nonvolatile memory device based on resistive switching in a bio‐organic polysaccharides film is presented. The polysaccharides are extracted from natural Aloe vera gel using facile alcohol precipitation. Optimal film deposition is achieved through spin‐coating followed by drying at 120 °C, which is higher than the usual processing temperature of commercial Aloe vera gel. Both bipolar and unipolar resistive switching can be induced in the polysaccharides film depending on the top electrode of the device. A comprehensive elucidation of the switching mechanism reveals the existence of various conduction processes that are electronic, electrochemical, and thermochemical in nature resulting in the unique resistive switching behaviors. The device is capable of delivering competitive performances, featuring wide read memory windows and large ON/OFF ratios that render it with potential as a next‐generation nonvolatile memory. The demonstration represents an important milestone toward the realization of green electronics.