In this study, we report the design and development of a high-performance self-powered UV-visible photodetector (UV-Vis PD) based on ZnO@CdS /poly(3,4- ethylenedioxyselenophene) nanoarrays (ZnO@CdS/PEDOS), in which ZnO nanorods (NRs) were modified with CdS to address the limitations of ZnO NRs-based photodetectors in detecting both UV and visible light. The findings of this study demonstrated that the modification of ZnO NRs with CdS led to the formation of a type II heterojunction. This modification not only enhanced the detection capability of the photodetectors under UV (365nm) light but also enabled efficient detection under visible light (450nm). The R and D* of the ZnO@CdS/PEDOS device were 7.68× 10-3A/W and 5.62×1011 Jones, respectively, with a τr of 0.19s using 0V and a UV light power (365nm) of 0.32mW/cm2. In addition, using a bias voltage of 0V and a visible light (450nm) at 0.32mW/cm2, the R was 2.53×10-3A/W and D* was 3.41×1010 Jones of the device were, the τr/τf were 0.23/0.29s, respectively. An excellent performance self-powered PD in the dual-wavelength range was constructed.