Fig. 3: Band diagrams and optoelectronic characteristics of the SWCNT/Gr/MoS2 flexible photodetector.

a SWCNT/Gr/MoS2 double van der Waals heterojunctions under darkness. b SWCNT/Gr/MoS2 double van der Waals heterojunctions under illumination. c Comparison of I–V curves between the Gr/MoS2 and SWCNT/Gr/MoS2 photodetectors. d Transient response and recovery time of SWCNT/Gr/MoS2 photodetectors. e Comparison of photo-responsivity between the Gr/MoS2 and SWCNT/Gr/MoS2 photodetectors