Piezoelectric effect in chemical vapour deposition-grown atomic-monolayer triangular molybdenum disulfide piezotronics
Type
ArticleAuthors
Qi, JunjieLan, Yann-Wen
Stieg, Adam Z.

Chen, Jyun-Hong
Zhong, Yuan-Liang
Li, Lain-Jong

Chen, Chii-Dong
Zhang, Yue
Wang, Kang L.
KAUST Department
Material Science and Engineering ProgramPhysical Science and Engineering (PSE) Division
Date
2015-06-25Online Publication Date
2015-06-25Print Publication Date
2015-12Permanent link to this record
http://hdl.handle.net/10754/558702
Metadata
Show full item recordAbstract
High-performance piezoelectricity in monolayer semiconducting transition metal dichalcogenides is highly desirable for the development of nanosensors, piezotronics and photo-piezotransistors. Here we report the experimental study of the theoretically predicted piezoelectric effect in triangle monolayer MoS2 devices under isotropic mechanical deformation. The experimental observation indicates that the conductivity of MoS2 devices can be actively modulated by the piezoelectric charge polarization-induced built-in electric field under strain variation. These polarization charges alter the Schottky barrier height on both contacts, resulting in a barrier height increase with increasing compressive strain and decrease with increasing tensile strain. The underlying mechanism of strain-induced in-plane charge polarization is proposed and discussed using energy band diagrams. In addition, a new type of MoS2 strain/force sensor built using a monolayer MoS2 triangle is also demonstrated. Our results provide evidence for strain-gating monolayer MoS2 piezotronics, a promising avenue for achieving augmented functionalities in next-generation electronic and mechanical–electronic nanodevices.Citation
Piezoelectric effect in chemical vapour deposition-grown atomic-monolayer triangular molybdenum disulfide piezotronics 2015, 6:7430 Nature CommunicationsPublisher
Springer NatureJournal
Nature CommunicationsPubMed ID
26109177Additional Links
http://www.nature.com/doifinder/10.1038/ncomms8430ae974a485f413a2113503eed53cd6c53
10.1038/ncomms8430
Scopus Count
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