We drift mobility deep trapping lifetime product, μτd of electrons, μτe, and holes, μτh, of hydrogenated amorphous silicon prepared using hot-wire chemical vapor deposition at substrate temperature of 200 °C was calculated using charge-collection as a function of applied voltage curves from time-of-flight measurements. μτd was observed to be a function of the position of the Fermi level. Microdoping with trimethylboron was used to go from undoped (slightly n-type, μτe>μτh) to slightly p-doped (μτh>μτe) films.