MoSe2 (2H Molybdenum Diselenide)

2H MoSe2 Molybdenum Diselenide MoSe2 (2H phase) is a semiconductor having an indirect band gap of ~1.1 eV. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers. MoSe2 belongs to the group-VI transition metal dichalcogenides (TMDC). To buy MoSe2 crystals please click here.

The 2H phase Molybdenum Diselenide crystals produced at HQ Graphene have a typical lateral size of ~0.8-1 cm, are hexagonal shaped and have a metallic appearance. We produce both p-type and n-type MoSe2, having a typical charge carrier density of ~1015cm-3 at room temperature and the p-type ~1018cm-3 and higher. A selection of peer review publications on the MoSe2 we sell can be found below.

MoSe2 crystal properties
Crystal size ~10 mm
Electrical properties Semiconductor, n-type (p-type is also available)
Crystal structure hexagonal
Unit cell parameters a = b = 0.329 nm, c = 1.289 nm, α = β = 90°, γ = 120°
Monolayer properties Link to C2DB containing calculated properties
Type Synthetic
Purity >99.995 %
Characterized by XRD, Raman, EDX, Hall measurement
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The single crystal MoSe2 is characterized using:

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.

Raman, XRD and EDX on MoSe2:

Click on an image to zoom

X-ray diffraction on a MoSe2 single crystal aligned along the (001) plane. XRD was performed at room temperature using a D8 Venture Bruker. The 4 XRD peaks correspond, from left to right, to (00l) with l = 2, 4, 6, 8

Powder X-ray diffraction (XRD) of a single crystal MoSe2. X-ray diffraction was performed at room temperature using a D8 Venture Bruker.

Stoichiometric analysis of a single crystal MoSe2 by Energy-dispersive X-ray spectroscopy (EDX).

Raman spectrum of a single crystal MoSe2. Measurement was performed with a 785 nm Raman system at room temperature.

HQ Graphene Wiki on:

2H-MoSe2 (2H phase Molybdenum Diselenide)

1. Weigao Xu et al., "Correlated fluorescence blinking in two-dimensional semiconductor heterostructures", Nature 541, 62-67 (2017), link to article:

2. Tomasz Jakubczyk et al., "Correlated fluorescence blinking in two-dimensional semiconductor heterostructures", Nano Lett., 2016, 16 (9), pp 5333-5339, link to article:

3. Beom Seo Kim et al., "Radiatively Limited Dephasing and Exciton Dynamics in MoSe2 Monolayers Revealed with Four-Wave Mixing Microscopy", Nature/Scientific Reports 6, Article number: 36389 (2016), link to article:

4. Kangwon Kim et al., "Davydov Splitting and Excitonic Resonance Effects in Raman Spectra of Few-Layer MoSe2", ACS Nano 10, 8113-8120 (2016), link to article:

5. S. Dufferwiel et al. "Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities", Nature Communications 6, 8579 (2015), link to article:


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