销售咨询
技术支持
联系客服
购前提示 |
常用产品货期为1-2天,非常用产品为一周; 进口产品、贵金属产品、订制规格产品,价格、货期影响因素较多。 关于货期、价格、质量规格等问题采购前,请于客服沟通。 |
2H-WS2 is a semiconductor with an indirect band gap of ~1.3 eV. Monolayer 2H-WS2 has a direct band gap. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. Tungsten Disulfide belongs to the group-VI transition metal dichalcogenides (TMDC).
The 2H phase WS2 crystals produced at HQ Graphene have a typical lateral size of ~0.8-1 cm, are hexagonal shaped and have a metallic appearance. The 2H WS2 is n-type semiconductor, having a typical charge carrier density of ~1014cm-3 at room temperature. A selection of peer review publications on the 2H-WS2 grown at HQ Graphene can be found below.
2H-WS2 crystal properties
Crystal size | ~10 mm |
Electrical properties | Semiconductor, n-type |
Crystal structure | hexagonal |
Unit cell parameters | a = b = 0.315 nm, c = 1.227 nm, α = β = 90, γ = 120° |
Type | Synthetic |
Purity | >99.995 % |
Characterized by | XRD, Raman, EDX, Hall measurement |
XRD: single crystal and powder X-ray diffraction (D8 Venture Bruker and D8 Advance Bruker)
EDX: Energy-dispersive X-ray spectroscopy for stoichiometric analysis
Raman: 785 nm Raman system
Hall measurement: Extraction of charge carrier density and doping in the Van der Pauw geometry.
Click on an image to zoom
X-ray diffraction on a single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 5 XRD peaks correspond, from left to right, to (00l) with l = 2, 4, 6, 8, 10
Powder X-ray diffraction (XRD) of a single crystal 2H-WS2. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.
Stoichiometric analysis of a single crystal 2H-WS2 by Energy-dispersive X-ray spectroscopy (EDX).
Raman spectrum of a single crystal 2H-WS2. Measurement was performed with a 785 nm Raman system at room temperature.
宝贝与描述相符
5