Plasmon-enhanced self-powered MoS₂photodetector viain-situsilver nanoparticle integration for real-time optical...

Silver nanoparticle (NP)-decorated molybdenum disulfide (MoS₂) microflowers are presented as a novel platform for high-performance, self-powered broadband photodetectors. In this work, MoS₂microflowers embedded with optimally sized Ag NPs are synthesized via a, eliminating post-deposition processes and enabling uniform NP distribution with strong plasmon-semiconductor interaction. The resulting device exhibits a broad photoresponse from 400 nm to 1100 nm, covering the visible to near-infrared spectrum. Under low illumination (2µW cm^-2), it achieves a responsivity of ∼1.9 × 10²A W^-1and a specific detectivity of ∼4.61 × 10¹¹Jones at bias voltage of 5.0 V, significantly outperforming most reported Ag-MoS₂systems. This enhanced performance is attributed to efficient plasmon-exciton coupling and hot electron injection facilitated by the Ag NPs. Importantly, the device generates a measurable photocurrent at zero bias, confirming truly self-powered operation. As a proof of concept, the photodetector is integrated into a real-time optical communication setup, successfully receiving and decoding alphanumeric and binary signals. These results highlight the technological promise ofin-situplasmonic 2D semiconductor hybrids for next-generation, broadband, low-power optoelectronic applications.