Sb₂Se₃ (Antimony Selenide)

A quasi-one-dimensional chalcogenide with an orthorhombic structure, space group Pnma, built from (Sb₄Se₆)_n ribbons bonded by van der Waals forces. It is an earth-abundant, non-toxic narrow-bandgap semiconductor (~1.1–1.2 eV) with strong light absorption and pronounced anisotropic carrier transport along its ribbons. These features make Sb₂Se₃ a promising absorber for thin-film photovoltaics and photodetectors.

Growth method: Chemical vapor transport (CVT).

Sample specifications: Individual crystals measure approximately 3 mm, with a purity of up to 99.9999% (6N), and multiple high-quality single-crystal pieces included in each package.

Exfoliation: Difficult — strong interlayer bonding; mechanical exfoliation typically yields thick flakes, and ultrathin flakes are challenging to isolate.