Gallium Selenide (GaSe)

摘要: Publisher Summary Gallium selenide (GaSe) is been proposed as the active compound for use in photovoltaic devices, intercalation electrodes electrochemical lithium cells, and a nonlinear optical medium. The belongs to family of metal chalcogens that crystallize layered structure. Each layer consists four atomic sheets, Se-Ga-Ga-Se, are bound together by strong forces, mostly covalent nature. forces between layers weak vander Waals type. structure GaSe D3hhexagonal symmetry with two formula units per unit cell. Because different ways stacking adjacent layers, crystallizes under several modifications. This chapter discusses various aspects ɛ modification. Brebner Deverin first report index refraction measurements GaSe. Their data were limited wavelength region vicinity band gap an undefined crystalline Adachi Shindo used spectroscopic ellipsometery measure complex dielectric function.