Stable and flexible photodetector based on liquid-phase exfoliated titanium disulfide nanosheets

Herein, the TiS₂nanosheets (NSs) are prepared from the TiS₂bulk by the liquid-phase exfoliation to fabricate photoelectrochemical-type (PEC) photodetector. SEM images and Raman spectra show the successful acquisition of the TiS₂NSs. The as-prepared TiS₂photodetector shows self-powered ability with an applicable photoresponsivity that is about 0.37μA W^-1under zero bias potential and 80 mW cm^-2visible light, and the response time of rise is 0.67 s and the decay time is 2.81 s. In this case, the photodetector is made of ITO-coated polyethylene terephthalate (PET), so it can maintain stable performance under the bending conditions. These results display that the as-prepared photodetector has excellent photoelectric properties, which facilitates the development of TiS₂NSs in optoelectronic devices.