Fig. 2
From: Origami silicon optoelectronics for hemispherical electronic eye systems
Electrical properties of a silicon optoelectronic device used for the electronic eyes. a Schematic illustration of a hexagon-shaped silicon nanomembrane-based photodiode used for the electronic eyes. An array of such photodiodes were printed and fabricated on a pre-cut flexible polyimide substrate. b Optical microscope image of the photodiodes. Scale bar, 50 μm. c Current density–voltage characteristics of the photodiode in the dark and under the illumination of lasers with wavelengths of 543 (green), 594 (yellow), and 633 nm (red). d Responsivity and external quantum efficiency of the photodiode under the illumination of lasers with green, yellow, and red wavelengths. The laser light intensities were 5 mW for the green and yellow wavelengths and 7 mW for the red wavelength. Green laser was used for the rest of this study
