Abstract:
:In this work, we report lateral heterojunction formation in as-exfoliated MoS2 flakes by thickness modulation. Kelvin probe force microscopy is used to map the surface potential at the monolayer-multilayer heterojunction, and consequently the conduction band offset is extracted. Scanning photocurrent microscopy is performed to investigate the spatial photocurrent response along the length of the device including the source and the drain contacts as well as the monolayer-multilayer junction. The peak photocurrent is measured at the monolayer-multilayer interface, which is attributed to the formation of a type-I heterojunction. The work presents experimental and theoretical understanding of the band alignment and photoresponse of thickness modulated MoS2 junctions with important implications for exploring novel optoelectronic devices.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Tosun M,Fu D,Desai SB,Ko C,Kang JS,Lien DH,Najmzadeh M,Tongay S,Wu J,Javey Adoi
10.1038/srep10990subject
Has Abstractpub_date
2015-06-30 00:00:00pages
10990issn
2045-2322pii
srep10990journal_volume
5pub_type
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