2D-SnS$_2$ Nanoflakes Based Efficient Ultraviolet Photodetector
Sanjeev Mani Yadav, Amritanshu Pandey
Abstract
This paper reports a SnS <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> 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 <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> nanoflakes of close to hexagonal shapes. A simple photoconductor structure on SiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /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 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">13</sup> 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.