This essential new title provides the basics, both theoretical and from recent experiments, that enable students to understand the physics of modern semiconductor devices and applications. Written in a clear language, the textbook serves as an introduction to the fundamental ideas of solid state and quantum physics and as a prerequisite for understanding semiconductor materials science. Featuring more than 100 figures and end-of-chapter problems, the book is an ideal companion for students and lecturers in a Bachelor course. Graduate students in semiconductor physics, condensed matter physics, and electrical engineering will also find this a useful textbook and reference work.