Plasmonic-tape-attached multilayered MoS₂ film for near-infrared photodetection

Molybdenum disulfide has been intensively studied as a promising material for photodetector applications because of its excellent electrical and optical properties. We report a multilayer MoS₂ film attached with a plasmonic tape for near-infrared (NIR) detection. MoS₂ flakes are chemically exfoliated and transferred onto a polymer substrate, and silver nanoparticles (AgNPs) dewetted thermally on a substrate are transferred onto a Scotch tape. The Scotch tape with AgNPs is attached directly and simply onto the MoS₂ flakes. Consequently, the NIR photoresponse of the MoS₂ device is critically enhanced. The proposed tape transfer method enables the formation of plasmonic structures on arbitrary substrates, such as a polymer substrate, without requiring a high-temperature process. The performance of AgNPs-MoS₂ photodetectors is approximately four times higher than that of bare MoS₂ devices.