Electrical Properties of Eggshell-Derived CaO Composited with Polyvinylpyrrolidone for Bistable Device

Abstract

In this work, bistable devices were fabricated from eggshell-derived calcium oxide (CaO). CaO powders can be obtained from the calcination of chicken eggshells at temperatures from 700-1000 °C. The properties of derived CaO were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, and field-emission scanning electron microscopy. CaO was composited with polyvinylpyrrolidone (PVP) polymer to fabricate a bistable device with the device structure of ITO/PVP:CaO/Al. The maximum ON/OFF current ratio for the device was approximately 104. In addition, the retention time operations reached higher than 104 s, which revealed the stability of the bistable device. The theoretical model and conduction mechanisms were presented to explain the behavior of the bistable device.