Flexible photodetector from ultraviolet to near infrared based on a SnS2 nanosheet microsphere film

Abstract

A new flexible ultraviolet (UV) to near infrared (NIR) photodetector based on a SnS₂ nanosheet self-assembled microsphere film has been fabricated onto a transparent polypropylene (PP) film using double-side adhesive tape, and its light-induced electric properties were investigated in detail. The detector demonstrates a remarkable photoresponse from 300 to 830 nm, a remarkable photocurrent depending on the optical power and light wavelength, as well as an excellent photoswitch effect and stability. In addition, another new rigid photodetector based on the same SnS₂ microsphere film has been fabricated on a SiO₂/Si substrate, showing similar photosensitive properties. It suggests that SnS₂ nanosheet microspheres are potential candidates for high-performance nanoscale optoelectronic devices, and the SnS₂-microsphere-based photodetector can be applied as a photodetector in the range of UV to NIR light because of its low cost and nontoxicity.