▎ 摘　　要

Vertically aligned ZnO nanorods (NRs) were grown on fluorine doped tin oxide (FTO) coated glass substrates using hydrothermal method. Self-powered broadband photodetector was fabricated with PbS decorated ZnO NRs and reduced graphene oxide (RGO) junction. ZnO NRs/PbS/RGO device demonstrated significant photocurrent over broad spectral range 350-700 nm. Our photodetector showed maximum external quantum efficiency (EQE) similar to 78%, responsivity R-lambda similar to 0.25A/W and detectivity (D-lambda) similar to 82944.55Hz(1/2)/W at 400 nm under zero bias. The transient photoresponse of the device exhibited fast response (similar to 65 ms) and recovery time (similar to 74 ms). Such PbS/ ZnO NRs p-n heterojunction also demonstrated photovoltaic properties with open circuit voltage (V-OC) similar to 0.27 V, short circuit current (J(SC)) similar to 1.03 mA/cm(2) and power conversion efficiency (PEC) similar to 0.73% under illumination of white light of intensity 100 mW/cm(2).