fig3

Figure 3. (A) Schematic of a PTE with Ag₂Se NRs and MWCNTs structures; (B) Time-resolved photoresponse. The wavelength was 650 nm with a power of 100 mW and the shutter opening and closing times are all 150 s; (C and D) Plots of output voltage as a function of device length and as a function of MWCNTs content; The wavelength was 650 nm with a power of 100 mW and (D) the shutter opening and closing times are all 20 s. PTE: Photothermoelectric; NRs: nanorods; MWCNTs: multi-walled carbon nanotubes.