Self-Powered ZnO Nanowire UV Photodetector Integrated With GaInP/GaAs/Ge Solar Cell

This letter reports the fabrication of a ZnO nanowire (NW) ultraviolet (UV) metal-semiconductor photodetector (MS-PD) integrated with a GaInP/GaAs/Ge triple-junction (TJ) solar cell. The ZnO NW MS-PD can detect UV light -4 A/W. In addition, the dynamic response of the ZnO NW MS-PD under the UV light illumination of 370 nm is stable and reproducible with an ON/OFF current ratio of ~1000.