Self-powered High Responsivity UV Detector based on Porous GaN/silver Nanoparticle Composite
DOI:
https://doi.org/10.6919/ICJE.202408_10(8).0009Keywords:
Porous Gallium Nitride; Localized Surface Plasma Excitations; Ultraviolet Detectors.Abstract
Photodetectors with Ag NPs/porous GaN composite structure were prepared by using NaNO3 solution as etching solution and porous GaN material prepared at 20 V voltage as substrate, and silver nanoparticles (Ag NPs) were deposited on the surface of it by electrochemical method. Based on the principle of localised surface equipartition excitations to improve the performance of the UV photodetector, the responsivity reaches 14.3 A/W, which is 18 times higher than that of the porous GaN device. At zero bias, the detector shows a low dark current of 2.21×10-11 A, and the device has a fast response with a rise time of 0.3 s and a fall time of 0.5 s. The photodetector has a high response with a rise time of 0.3 s and a fall time of 0.5 s.
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