Also called SnS₂, SnSe₂
Tin-based layered semiconductors made from earth-abundant, low-toxicity elements. SnS2 absorbs visible light and suits photodetectors and photocatalysis; SnSe2 is naturally heavily electron-doped and is often used as the n-side of tunnel junctions with other 2D materials.
They are coordination polyhedra. Only complete ones are drawn.
Three layers of SnS2 in its commonest polytype, where each layer sits directly over the one below and a single layer is the whole repeat: c = 5.88 Å. The SnS2 literature often calls this polytype 2H, counting sulfur planes rather than layers. Cell of the mineral berndtite at ambient pressure, from Hazen and Finger, American Mineralogist 63, 289 (1978); COD 9000613.
Readiness runs lab → prototype → pilot → deployed.
Short notes for specialists. Choose a lens in the header and yours comes first.
Indirect gaps with the conduction band minimum at the zone boundary; PBE underestimates by the better part of an electronvolt, so use hybrids or GW. Band-alignment calculations for tunnel heterojunctions must include interface dipoles and spin–orbit coupling in the partner layer.
Raman A1g near 315 cm−1 for SnS2 and near 185 cm−1 for SnSe2. Expect polytype mixtures in vapour-transport crystals and check stacking by XRD or TEM before assigning optical features.
Attractive for abundance, low toxicity and low deposition temperature, but performance does not yet justify industrial effort outside photodetectors and energy storage.
The newest items tagged SnS2, SnSe2, from the news feed updated 5 Oct 2026.
S-scheme heterojunctions offer a route to separate photogenerated carriers while retaining strong redox capability, but how interfacial chemical modification controls the underlying carrier dynamics remains insufficiently understood. Here, we systematically investigate the carrier dynamics of pristi… [Phys. Rev. B 114…
Optoelectronic synaptic devices hold promise for neuromorphic computing owing to their low power consumption and high bandwidth. In defect-engineered optoelectronic synapses, however, the active manipulation of defect occupancy by external...
Interlayer charge-transfer states in SnS2/InSe Van der Waals heterostructures realizing mid-infrared photodetection
Two-dimensional (2D) SnSe is an emerging 2D material exhibiting intriguing properties such as ferroelectricity and nonlinear optical response. Here, high-quality single-crystalline SnSe nanosheets were synthesized via NaCl-assisted chemical vapor deposition (CVD) method. The addition of NaCl was found to significantly…
Monolayer SnS2 has emerged as a promising visible-light photocatalyst for photoelectrochemical applications, owing to its strong optical absorption in the visible range and excellent chemical stability. Despite its reduced dimensionality - where excitonic effects are expected to be pronounced - comprehensive…
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