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Plasmon-Enhanced Visible and Near-Infrared Photodetection with Gold Nanorods UCNPs/MoSsub.2 Hybrid Device
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Journal Article
Plasmon-Enhanced Visible and Near-Infrared Photodetection with Gold Nanorods UCNPs/MoSsub.2 Hybrid Device
2025
Overview
The near-infrared photodetection of monolayer MoS[sub.2] can be achieved using upconverted nanoparticles (UCNPs). Herein, we demonstrated that gold nanorods (Au NRs) further enhanced the near-infrared photoresponsivity of a hybrid device via the surface plasmon enhancement of the localized field. We synthesized a three-layer device comprising Au NRs, UCNPs (NaYF[sub.4]:Yb[sup.3+], Er[sup.3+]), and monolayer MoS[sub.2], and examined its photoelectric characteristics using laser irradiation with varying power densities at 980 nm, the excitation wavelength of UCNPs. Compared with a device without Au NRs, the photoelectric response of the three-layer device was greatly improved at 5 V bias, and photoresponsivity was increased at visible wavelengths (450, 532, and 635 nm). This study contributes to the knowledge of two-dimensional materials for the development of hybrid photoelectronic devices.
Publisher
MDPI AG
Subject
