2D-SnS$_2$ Nanoflakes Based Efficient Ultraviolet Photodetector

This paper reports a SnS ₂ nanoflakes based UV photodetector having high sensitivity and thermal stability upto 120°C. Simple and low cost solvothermal technique has been used to synthesize SnS ₂ nanoflakes of close to hexagonal shapes. A simple photoconductor structure on SiO ₂ /Si substrate is fabricated by using Agas contact material. The resultant device has good sensitivity (~400), responsivity (~5.5 A/W), EQE (~1868%), detectivity (~1.72 × 10 ¹³ Jones) and low response time (~2.2 s). The reported characteristics are superior to many other UV photodetectors utilizing complex hybrid structure of the device, either in form of additional filter layer or nanostructural light sensitive material.