WSe₂ (Tungsten Diselenide)

WSe₂ is a layered transition metal dichalcogenide that crystallizes in the 2H phase under ambient conditions. It is an indirect-band-gap semiconductor with a bulk band gap of about 1.2 eV, known for its ambipolar transport and intrinsic p-type tendency, and is widely used in 2D transistors and van der Waals heterostructures.

Growth method: Chemical vapor transport (CVT).

Sample specifications: Individual crystals measure approximately 3–4 mm, with a purity of up to 99.999% (5N), and 2–3 high-quality single-crystal pieces included in each package.

Exfoliation: Easy — readily cleaved into thin flakes by standard mechanical exfoliation.