Fig. 3From: Fabrication and Optimization of Vertically Aligned ZnO Nanorod Array-Based UV Photodetectors via Selective Hydrothermal SynthesisMorphology-dependent device characteristics of PD. a Cross-sectional views of FE-SEM images of the grown ZnO NRAs at different solution concentrations: (i) 5 mM, (ii) 25 mM, and (iii) 50 mM and b measured I-V curves of the corresponding samples at dark and under light illumination of 365 nmBack to article page