A type-II GeSe/SnS heterobilayer with a suitable direct gap, superior optical absorption and broad spectrum for photovoltaic applications

Abstract

Type-II band alignment, a suitable direct gap (1.519 eV), superior optical-absorption (∼105) and a broad spectrum make the GeSe/SnS heterobilayer a promising material for photovoltaic applications.

Revealing anisotropy and thickness dependence of Raman spectra for SnS flakes

“…Its large absorption coefficient ($10 5 cm À1 ), 9,10 as well as the predicted high carrier mobility, 7 renders it a great of potential applications in optoelectronic and electronic devices. 2,4,[11][12][13][14][15][16][17][18] Moreover, similar to the black phosphorous (BP) with puckered honey-comb crystal structure, SnS also possesses anisotropic electronic, 19,20 thermoelectric, [21][22][23] piezoelectric 24 and optical 25,26 properties. Given the strongly anisotropic properties of SnS, the SnS-SnS x Se 1Àx core-shell heterostructure with anisotropic photoresponse and the SnS-based photodetector with highly anisotropic performance of near-infrared have been achieved.…”

Study on electronic and optical properties of the twisted and strained MoS2/PtS2 heterogeneous interface

“…MoS 2 /PtS 2 heterogeneous interfaces by the first principle methods, which has been widely used in many previous studies for bilayer structures [14,[17][18][19][21][22][23][24].…”

The Electronic and Optical Properties of InSe-GeTe Heterobilayer via Applying Biaxial Strain

“…For example, a series of theoretical studies [5][6][7] reported that graphene/silicone heterobilayer (HBL) exhibited stronger optical absorption than silicene and graphene monolayers. More recently, germanium monochalcogenides (GeX, X = S, Se, Te) arouse widespread attention in scientific community, because of their excellent mechanical flexibility, high carrier mobility, suitable band structures as well as inherent dipoles with large difference in electronegativity [8][9][10]. Particularly, layered Germanium telluride (GeTe), has been widely investigated in various fields due to its predominate semiconducting and ferroelectric nature, such as Li-ion batteries [11] and photocatalytic water splitting [12].…”