title: Determination of the basic optical parameters of ZnSnN(2).
abstract: Polycrystalline ZnSnN(2) thin films were successfully prepared by DC magnetron sputtering at room temperature. Both the as-deposited and annealed films showed n-type conduction, with electron concentration varying between 1.6×10(18) and 2.3×10(17)  cm(-3) and the maximum mobility of 3.98  cm(2)  V(-1) s(-1). The basic optical parameters such as the refraction index, extinction coefficient, and absorption coefficient were precisely determined through the spectroscopic ellipsometry measurement and analysis. The optical bandgap of the ZnSnN(2)films was calculated to around 1.9 eV, with the absorption coefficient greater than 10(4)  cm(-1) at wavelengths less than 845 nm. The easy-fabricated ZnSnN(2) possesses a sound absorption coefficient ranging from the ultraviolet through visible light and into the near-infrared, comparable to some typical photovoltaic materials such as GaAs, CdTe, and InP.
authors.forename: Fuling
authors.initials: F
authors.lastname: Deng
authors.forename: Hongtao
authors.initials: H
authors.lastname: Cao
authors.forename: Lingyan
authors.initials: L
authors.lastname: Liang
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Junhua
authors.initials: J
authors.lastname: Gao
authors.forename: Hongliang
authors.initials: H
authors.lastname: Zhang
authors.forename: Ruifeng
authors.initials: R
authors.lastname: Qin
authors.forename: Caichi
authors.initials: C
authors.lastname: Liu