Implementing two dimensional materials as an active layer in flexible photodetectors has gained interest due to their high mechanical flexibility and excellent optoelectronic properties. Here, we demonstrate a high-performance flexible photodetector based on liquid-phase exfoliated MoS2 nanosheets (NSs), exhibiting fast and stable performance under ambient conditions. The obtained NSs have a lateral size of hundreds of nanometres, an average thickness of similar to 3 nm and high crystallinity in the semiconducting 2H phase. The devices show stable current-time (I-t) characteristics under pulsed illumination with the transient rise and decay time constant around 135 mu s. The devices exhibit excellent omnidirectional light detection capabilities for wide incident angles ranging from 0 degrees to 70 degrees. It also shows a non-linear dependence on incident intensity with a power-law exponent of 0.75, indicating defect-assisted trapping of photo-generated charge carriers. Efficient photoresponse is observed in MoS2 NSs-based flexible photodetectors with different radii and repeated bending.
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