WO3/NiO composite nanoparticles as promising material for low power UV-light sensor

Abstract

In this article, we have demonstrated WO3/NiO nanocomposite (NC) based UV photodetector (PD) synthesized using RF sputtering technique. The fabricated WO3/NiO NC were porous and crystalline in nature with average diameter of ~ 29.8 nm. This fabricated WO3/NiO NC photodetector exhibited a low dark current value of 0.32 µA at -1 V applied bias. Moreover, the device showed high photo sensitivity (36), and responsivity (2.24 mA/W) without any applied bias demonstrating its self-powered application. A high detectivity of 3.82 × Jones along with low noise equivalent power (NEP) of 88 pW at 0 V was obtained under the illumination of UV light. The WO3/NiO NC detector also showed fast switching response with rise time of 0.65 s and fall time of 0.33 s (at 0 V) demonstration its application as a low power photodetector. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.