NbOI₂ (Niobium Oxyiodide)

NbOI₂ is a layered transition-metal oxydihalide and a van der Waals ferroelectric semiconductor from the same family as NbOCl₂ and NbOBr₂. It exhibits in-plane anisotropy and a strong nonlinear optical and second-harmonic response, serving as a candidate material for polarization-resolved photodetection, nonlinear optics, and quantum light sources.

Growth method: Chemical vapor transport (CVT).

Sample specifications: Individual crystals measure approximately 2~3 mm, with a purity of up to 99.9999% (6N), and multiple high-quality single-crystal pieces included in each package.

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