Hydrogen is employed to saturate broken ("dangling") bonds of amorphous silicon and amorphous carbon that helps stabilizing material properties. It is also a potential electron donor in various oxide materials, including ZnO, SnO2, CdO, MgO, ZrO2, HfO2, La2O3, Y2O3, TiO2, SrTiO3, LaAlO3, SiO2, Al2O3, ZrSiO4, HfSiO4, and SrZrO3.
ZnO , SnO2 , CdO , MgO , ZrO2 , HfO2 , La2O3 , Y2O3 , TiO2 , SrTiO3 , LaAlO3 , SiO2 , Al2O3 , ZrSiO4 , HfSiO4 , and SrZrO3 use hydrogen as an electron donor .