High Detectivity and Fast MoS<sub>2</sub> Monolayer MSM Photodetector
Ruchi Singh, Chandrabhan Patel, Pawan Kumar, Mayank Dubey, Sharath Sriram, Shaibal Mukherjee
Abstract
Metal–semiconductor–metal (MSM) photodetectors offer efficient solutions for many applications. Here, we combine surface energy assisted wet transfer of a MoS2 monolayer with patterned interdigitated platinum electrodes. The chemical vapor deposition (CVD)-deposited MoS2 monolayer is analyzed for various performance parameters. The achieved dark current and photocurrent are 5.37 × 10–8 A and on the order of 10–5 A, respectively. The achieved peak responsivity and peak external quantum efficiency are 13.15 mA/W at 480 nm and 21.86% at 4.5 V, respectively. The Ion/Ioff ratio obtained is 256 for 5 V with a rise and fall time of 0.06 and 0.14 ms, respectively.