Tin Sulfide Flower-Like Structure as High-Performance Near-Infrared Photodetector

A pH reaction solution adjustment approach is proposed to improve the performance of a flower-like structure-based SnS photodetector. A relatively low-cost chemical bath deposition was adopted to control the growth of a SnS flower-like structure onto a flexible polyethylene terephthalate substrate. The photoresponse characteristics were measured and analyzed using near-infrared (NIR) illumination (850 nm) at various bias voltages. The presented photodetector manifested excellent stability and photoresponse characteristics, including sensitivity (304), the rise time (0.11 s) and the decay time (0.15 s) at 3 V of bias voltage. Based on its good performance, flexibility, low cost, and non-toxic nature, the fabricated flexible photodetector is very promising in the range of NIR.