Electronic Conduction in Amorphous Semiconductors

A review is given of some electronic conduction processes in amorphous semiconductors and insulators. A detailed discussion is given of donorlike and traplike states in disordered solids and the various transitions between them are discussed in the context of low- and high-field conductivity under dc and ac conditions. Recent experimental and theoretical results are described relating to amorphous films of SiO, Ge, Si, and C. Some experimental results and theoretical interpretations of photoconductive studies on SiO are also given.