Abstract: The present disclosure relates to a method of forming a semiconductor. The method includes heating a substrate in a reaction chamber, supplying to the reaction chamber a first constituent including a metal borohydride wherein the metal borohydride includes at least one of: an alkaline earth metal, a transition metal, or a combination thereof; supplying to the reaction chamber a main-group hydride constituent; and depositing a metal compound on the substrate, wherein the metal compound comprises a) at least one of an alkaline earth metal a transition metal or a combination thereof, b) boron and c) optionally the main group alloying element.