Structural and optical properties of Zn3N2 films prepared by magnetron sputtering in NH3-Ar mixture gases
NH3-Ar气氛下制备的Zn3N2薄膜的结构和光学性能

Zinc nitride films were prepared by RF magnetron sputtering a metallic zinc target in NH3-Ar mixture gases on glass substrate at room temperature. The effects of NH3 ratio on the structural and optical properties of the films were examined. X-ray diffraction (XRD) analysis indicates that the films are polycrystalline and have a preferred orientation of (321). An indirect optical band gap increased from 2.33 to 2.70 eV when the NH3 ratio varied from 5% to 25%. The photoluminescence (PL) spectrum shows two emission peaks; the peak located at 437 nm is attributed to the incorporation of oxygen, and the other at 459 nm corresponds to the intrinsic emission.