Epitaxial growth of non-layered PbSe nanoplates on MoS2 monolayer for infrared photoresponse. (9th April 2019)

• Record Type: Journal Article
• Authors: Chen, Tianren; Fan, Chao; Zhou, Weichang; Zou, Xuming; Xu, Xing; Wang, Songyang; Wan, Qiang; Zhang, Qinglin
• Is Part Of: Applied physics express. Volume 12:Number 5(2019)
• Publication Date: 2019-04-09
• Subjects: Physics -- Periodicals; Technology -- Periodicals; 621.05
• DOI: 10.7567/1882-0786/ab10e5
• Languages: English
• ISSNs: 1882-0778

Abstract

Abstract: The epitaxial growth of non-layered PbSe nanoplates on monolayer MoS2 is demonstrated. Scanning electron microscopy characterization reveals a position-independent growth of PbSe plates on a MoS2 sheet with large coverage. The epitaxial relationship between the PbSe plates and MoS2 sheet was found to be ( 200 ) PbSe ∥ ( 1 1 ̄ 00 ) MoS 2 in-plane and ( 001 ) PbSe ∥ ( 0001 ) MoS 2 in the thickness direction. Photodetectors based on these heterostructures exhibit a responsivity and detectivity of 51 mA W –1 and 4.4 × 10 6 Jones, respectively, under 1550 nm light illumination at room temperature. The realization of these PbSe/MoS2 heterostructures paves the way for the application of transition metal dichalcogenides in the IR light region.