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This study reports ultraviolet (UV) photodetectors based on CuGaO 2 (CGO) nanoplates (NPs) and Zn-doped CGO (CZGO) NP/ZnO nanowire (NW) heterojunctions. The vertical arrays of ZnO NWs are uniformly grown on the surface of hexagonal CZGO NPs and form a high-density p-n junction. The heterojunctions have better optoelectronic performance parameters than pure CGO NPs. Especially, the responsivity value of CZGO NP/ZnO NW heterojunctions reaches 0.12 A W À1 , and the photo-to-current ratio is estimated to be 4.5. This work offers a new idea for the rational design of optoelectronic devices from the synergetic effect of p-type CZGO NPs and n-type nanostructures.

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