Resistivity, Hall effect, and optical absorption of electrodeposited films have been investigated. Films of both crystalline modifications show low resistivities and electron densities of about 1021 cm−3. Free electrons are due to nonstoichiometry or to incorporation of hydrogen. As a result of the high carrier densities, the absorption edge is shifted to higher photon energies. The band gaps of intrinsic are about 1.4 eV.