Fig. 4
From: UV-Visible Photodetector Based on I-type Heterostructure of ZnO-QDs/Monolayer MoS2
a Photocurrent of pristine device and ZnO-QDs/MoS2 photodetector illuminated under different PD with different wavelength at Vds = 1 V. b Multiple cycles of photoresponse of the ZnO-QDs/MoS2 photodetector under DUV (254 nm) and UV (375 nm) light illumination (Vds = 1 V). The response time of c pristine device and d ZnO-QDs/MoS2 photodetector illuminated under PD of 35 mW/cm2 with wavelength of 635 nm at Vds = 1 V. e Normalized PDCR of ZnO-QDs/MoS2 photodetector under a 532-nm laser illumination at Vds = 1 V; photocurrent measured at day 1 and day 31 was inserted for better comparison