Fig. 10
From: Status and Prospects of ZnO-Based Resistive Switching Memory Devices
a UV-laser confocal image of inkjet-printed ITO electrodes on a GZO/spin-coated ITO/glass substrate. b Schematic of an all solution processed ITO/GZO/ITO RRAM device. c Surface profile of the top electrodes following the yellow line in (a). d UV-vis transmittance of bare glass (black), ITO/glass (green), GZO/glass (red), and ITO/GZO/ITO/glass (blue). To determine the optical properties, both the ITO bottom and top layers were spin-coated four times, resulting in a film with a thickness of ∼30 nm. The inset is a photograph of the sol-TRRAM (ITO/GZO/ITO/glass) device. The background is observed through the device without refraction or distortion [214]