The third edition of this distinguished text describes the basic quantum-mechanical processes in homogeneous semiconductors which are most relevant to applied semiconductor physics. Unlike other texts which have sought to cover all aspects of semiconductors, including physical and chemical aspects, this text concentrates almost exclusively on electronic processes. Principle topics include crystalline materials in which the electron and holes in the bands obey non-degenerate statistics. Basic quantum mechanics are discussed, stressing the principles of first- and second-order perturbation theory. This updated edition includes a new chapter on phonon processes. Besides being a useful reference for workers in the field, this book will be a valuable text for students studying quantum processes in semiconductors.