Antimony selenide (Sb₂Se₃) is a promising absorber material for thin film photovoltaics because of its attractive material, optical and electrical properties. In recent years, the power conversion efficiency (PCE) of Sb₂Se₃ thin film solar cells has gradually enhanced to 5.6%. In this article, we systematically studied the basic physical properties of Sb₂Se₃ such as dielectric constant, anisotropic mobility, carrier lifetime, diffusion length, defect depth, defect density and optical band tail states.We believe such a comprehensive characterization of the basic physical properties of Sb₂Se₃ lays a solid foundation for further optimization of solar device performance.