Abstract
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 (365 nm) light but also enabled efficient detection under visible light (450 nm). The R and D* of the ZnO@CdS/PEDOS device were 7.68× 10−3 A/W and 5.62×1011 Jones, respectively, with a τr of 0.19 s using 0 V and a UV light power (365 nm) of 0.32 mW/cm2. In addition, using a bias voltage of 0 V and a visible light (450 nm) at 0.32 mW/cm2, the R was 2.53×10−3 A/W and D* was 3.41×1010 Jones of the device were, the τr/τf were 0.23/0.29 s, respectively. An excellent performance self-powered PD in the dual-wavelength range was constructed.
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