Near-infrared photodetector achieved by chemically-exfoliated multilayered MoS2 flakes

Title
Near-infrared photodetector achieved by chemically-exfoliated multilayered MoS2 flakes
Authors
고형덕박민지박기선
Issue Date
2018-08
Publisher
Applied surface science
Citation
VOL 448-70
Abstract
A near-infrared (NIR) photodetector built from chemically exfoliated multilayer MoS2 films was investigated. Devices that are photoresponsive to wavelengths up to 1550  nm were fabricated using 25-nm-thick MoS2 films. To the best of our knowledge, this is the first time such a detector was produced using chemical exfoliation. As the thickness was increased to 25  nm, the MoS2 flakes formed a nearly or fully continuous film with a 2H-dominant phase, and also exhibited enhanced NIR absorption up to 1550  nm. We conjecture that the defects formed during chemical exfoliation affect the intrinsic bandgap of MoS2, extending its spectral absorption range into the NIR range. Moreover, the responsivity of the device was enhanced by introducing plasmonic Ag nanocrystals.
URI
http://pubs.kist.re.kr/handle/201004/67739
ISSN
0169-4332
Appears in Collections:
KIST Publication > Article
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