Constraints on Sub-GeV Dark Matter-Electron Scattering from the DarkSide-50 Experiment

The DarkSide-50 experiment uses a two-phase argon time projection chamber to directly search for dark matter interactions. Light dark matter particles can scatter off of bound electrons in the detector, producing ionization signals. These S2-only events in the DarkSide-50 data set are used to place 90\% C.L.\ limits on sub-GeV dark matter-electron scattering rates. I will present these new constraints, along with expected recoil spectra for dark matter-electron scattering in argon.