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

摘要： This paper reports a SnS2 nanoflakes based UV photodetector having high sensitivity and thermal stability upto 120 ?C. Simple and low cost solvothermal technique has been used to synthesize SnS2 nanoflakes of close to hexagonal shapes. A simple photoconductor structure on SiO2/Si substrate is fabricated by using Ag as contact material. The resultant device has good sensitivity (～400), responsivity (～5.5 A/W), EQE (～1868%), detectivity (～1.72 × 1013 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.