Abstract
Simple and cost-effective hydrothermal technique combined with the photo-deposition method was successfully employed to synthesize silver nanoparticles-encapsulated-zinc oxide nanorods (Ag NPs/ZnO NRs) arrays on Silicon (Si) substrate for the fabrication of self-power metal-semiconductor-metal (MSM) Ultraviolet (UV) photodetector device. The Field Emission Scanning Electron Microscope (FESEM) results showed that there was a noticeable change in the morphological surface of ZnO NRs after the photo-deposition process, corroborating the presence of Ag NPs. For Ag NPs/ZnO NRs photodetector, the current-voltage (I-V) characteristics demonstrated that its conductivity was significantly enhanced compared to the photodetector without Ag NPs. For the MSM device fabricated with (Ag NPs/ZnO NRs), it has recorded a responsivity value of 42.79 A W−1, and external quantum efficiency (EQE) of 13,436.06% at 15 V bias voltage. Lastly, the modified device has a sensitivity of 18503% at 0 V bias voltage, making the device suitable as self-powered photodetectors.
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