High-Performance SnS₂ and CuO Nanocomposite-Based Broadband Photodetector

This article discusses a broadband photodetector that operates in the ultraviolet (UV), visible, and near- infrared (NIR) spectrums and is based on a nanocomposite (NC) of tin disulfide (SnS2) and copper oxide (CuO). A low-cost solution approach is used to build the suggested device structure aluminum (Al)/SnS2:CuO/poly(3,4-ethyle- nedioxythiophene) [PEDOT]:poly(styrenesulfonate) (PSS)/ indium tin oxide (ITO)/polyethylene terephthalate (PET). The broad absorption spectrum of the proposed device covers UV–visible–NIR. At an incident power of 0.118 $\mu \text{W}$ and a reverse bias of −1 V, the measured responsivity values (A/W) and external quantum efficiencies of the proposed device are 1.87, 13.51, and 111.74 and 775.41%, 3351.49%, and 13196.12% correspondingly. The suggested photodetector (PD) has a rising time ( ${t}_{r}$ ) of 162.63/83.41/ 72.27 $\mu \text{s}$ and a falling time ( ${t}_{f}$ ) of 57.96/29.23/21.62 $\mu \text{s}$ at 300-/500-/1050-nm wavelengths and −1 V bias. The study also takes the stability of the suggested structure into account.