[en] Thin-film Mg₂Si was deposited using radio frequency (RF) magnetron sputtering. Al and Sn were incorporated as n-type dopants using co-sputtering to tune the thin-film electrical properties. X-ray diffraction (XRD) analysis confirmed that the deposited films are polycrystalline Mg₂Si. The Sn and Al doping concentrations were measured using Rutherford backscattering spectroscopy (RBS) and energy dispersive X-ray spectroscopy (EDS). The charge carrier concentration and the charge carrier type of the Mg₂Si films were measured using a Hall bar structure. Hall measurements show that as the doping concentration increases, the carrier concentration of the Al-doped films increases, whereas the carrier concentration of the Sn-doped films decreases. Combined with the resistivity measurements, the mobility of the Al-doped Mg₂Si films is found to decrease with increasing doping concentration, whereas the mobility of the Sn-doped Mg₂Si films is found to increase. - Highlights: • RF magnetron sputtering was used to deposit thin film Mg₂Si. • Al and Sn atoms were incorporated into Mg₂Si using co-sputtering. • The RBS results show that Sn is uniformly distributed in depth in the Mg₂Si films. • Electrical transport properties of the films were determined by Hall measurements. • The mechanism of Sn doping was studied using XRD.