Abstract
Here, we have used a simple method for polyol synthesis, analysis, and testing of Au/Cu-doped ZnO Ultraviolet (UV) photodetectors (PD). Our results are reported and discussed by X-ray diffraction (XRD) to ensure that the manufactured samples show a hexagonal wurtzite ZnO structure. Transmission electron microscopy (TEM) confirmed the nanoparticle growth in the hexagonal sample on the surface, which is the key to improving the light response. Our prepared UV PD Au/Cu codoped ZnO showed a rapid time at a power density of 7.6 mW. the highest responsivity of R = 575 mA/W and sensitivity 103 obtained at 7.6 mW with an applied voltage of 1 V. Our results demonstrate the obvious substitution of Au and Cu in ZnO, thereby improving the UV-sensing light response.
Highlights
Photodetectors are important for a range of applications such as smart sensors, biological sensors, satellite communication, and pharmaceutical analyses [1,2,3]
Our work reports a high photoresponse UV PD-based Au/Cu codoped ZnO which is elaborated by polyol process
Further increment of photocurrent in Au Nps based device is believed to be due to the localized surface plasmon resonance (LSPR) effects such as near-field enhancement, transfer of plasmon resonance energy and strong absorption light from plasmonic NPs to ZnO [24,25,26]
Summary
Photodetectors are important for a range of applications such as smart sensors, biological sensors, satellite communication, and pharmaceutical analyses [1,2,3]. Pure ZnO nanoparticles are n-type semiconductors, and their optical and electrical properties are inferior and more unstable without doping elements [6].
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