CuO and MoS₂ Nanocomposite-Based High-Performance Wideband Photodetector

This article reports an aluminum (Al)/copper oxide (CuO):molybdenum disulfide (MoS2)/indium tin oxide (ITO)-coated polyethylene terephthalate (PET) structure-based broadband photodetector (PD). In the device, CuO:MoS2 nanocomposite prepared through the dispersion method acts as an active layer. The spin coating technique was employed to deposit the nanocomposite film upon ITO-coated PET, followed by the Al contacts deposition by means of a thermal evaporation unit. The fabricated PD shows a broadband response with maximum responsivity <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">${R}_{S}{R}_{S}$ </tex-math></inline-formula> (A/W) of 1.23, 289.08, and 217.58 A/W at 300 nm (UV), 550 nm (visible), and 850 nm (IR) for −1 V bias at a fixed optical power of <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> <tex-math notation="LaTeX">$0.118~\mu $ </tex-math></inline-formula>W. For optoelectronic applications, the CuO:MoS2 nanocomposite exhibits promising properties.