2023/08/28 by Shyam Narayan Singh Yadav, Yadav, Shyam Narayan Singh, Po‐Liang Chen +15
Computer Science · Engineering · #Advancements in Semiconductor Devices and Circuit Design #FOS: Physical sciences #Materials Science (cond-mat.mtrl-sci) #Nanowire Synthesis and Applications #Neural Networks and Reservoir Computing
paper · pdf · doi:10.48550/arxiv.2308.14750
openalex publication_date 2023/08/28 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Owing to its atomically thin thickness, layer-dependent tunable band gap, flexibility, and CMOS compatibility, MoS2 is a promising candidate for photodetection. However, mono-layer MoS2-based photodetectors typically show poor optoelectronic performances, mainly limited by their low optical absorption. In this work, we hybridized CVD-grown monolayer MoS2 with a gold nanodisk (AuND) array to demonstrate a superior visible photodetector through a synergetic effect. It is evident from our experimental results that there is a strong light-matter interaction between AuNDs and monolayer MoS2, which results in better photodetection due to a surface trap state passivation with a longer charge carrier lifetime compared to pristine MoS2. In particular, the AuND/MoS2 system demonstrated a photoresponsivity of 8.7 × 104 A/W, specific detectivity of 6.9 × 1013 Jones, and gain 1.7 × 105 at 31.84 μW/cm2 illumination power density of 632 nm wavelength with an applied voltage of 4.0 V for an AuND/MoS2-based photodetector. To our knowledge, these optoelectronic responses are one order higher than reported results for CVD MoS2-based photodetector in the literature.