Ultrasensitive all-2D MoS2 phototransistors enabled by an out-of-plane MoS2 PN homojunction

Nengjie Huo and Gerasimos Konstantatos ()
Additional contact information
Nengjie Huo: The Barcelona Institute of Science and Technology
Gerasimos Konstantatos: The Barcelona Institute of Science and Technology

Nature Communications, 2017, vol. 8, issue 1, 1-6

Abstract: Abstract Two-dimensional transition metal dichalcogenide-based photodetectors have demonstrated potential for the next generation of 2-dimensional optoelectronics. However, to date, their sensitivity has not been superior to that of other technologies. Here we report an ultrasensitive two-dimensional photodetector employing an in-plane phototransistor with an out-of-plane vertical MoS2 p–n junction as a sensitizing scheme. The vertical built-in field is introduced for the first time in the transport channel of MoS2 phototransistors by facile chemical surface doping, which separates the photo-excited carriers efficiently and produces a photoconductive gain of >105 electrons per photon, external quantum efficiency greater than 10%, responsivity of 7 × 104 A W−1, and a time response on the order of tens of ms. This taken together with a very low noise power density yields a record sensitivity with specific detectivity $$D^*$$ D * of 3.5 × 1014 Jones in the visible and a broadband response up to 1000 nm.

Date: 2017
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-017-00722-1 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-00722-1

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-017-00722-1

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().